- Welch, R. C. 1980. The Coleoptera of Monks Wood National Nature Reserve, Cambridgeshire (Vice County), fifth supplement, 1974-1979. Entomologist's Gazette 31263-273.
- Welch, R. C. 1987. Xyleborus saxeseni (Ratz) {Col, Scolytidae} attracted to blue dar in forest of Dean, Gloucestershire. Entomologist's Monthly Magazine 123161.
- Roughley; Welch 1923
- Welch, H. E. 1963. Nematode infections. Pp. 353-392. in: Insect Pathology: an advanced treatise. Steinhaus, E. A. (eds.) Academic Press,New York and London. xiv+689 pp..
- Nickle, W. R., and H. E. Welch. 1984. History, development, and importance of insect nematology. Pp. 627-653. in: Plant and Insect Nematodes. Nickle, W. R. (eds.) Marcel Dekker, Inc.,New York. xiv+925 pp..
- Jones, W. L., and H. E. Welch. 1982. Biological control of the elm bark beetle, Hylurgopinus rufipes: effectiveness of nematodes (DD-136) applied in Tenogum. Abstract. Entomological Society of Manitoba, Proceedings 38:26.
- Tomalak, M., H., and E. Welch. 1981. Neoaplectana carpocapsae Weiser (Rhabditoidea, Nematoda) DD-136 as a potential biocontrol agent against Hylurgopinus rufipes Eichhoff (Scolytidae, Coleoptera). Pages 14-23 in E. S. Kondo, Y. Hiratsuka, and W. B. G. Denyer (eds.), Proceedings, Dutch elm disease symposium and workshop, 5-19 October 1981, Winnipeg, Manitoba. Canada Department of the Environment, Canadian Forestry Service and Province of Manitoba, Department of Natural Resources. 517 p.
- Tomalak, M., H., and E. Welch. 1982a. Histological degradation as a cause of bark beetle mortality in nematode infections . Entomological Society of Manitoba, Proceedings 38:25-26.
- Tomalak, M., H., and E. Welch. 1982b. Pathological effects of nematode parasitism in bark beetles (Coleopetera: Scolytidae). Mol. Biochem. Parasitol. 1982(Suppl.):411-412.
- Tomalak, M., H., and E. Welch. 1983. Parasite overcrowding and its effect on the nematodes infesting bark beetles [abstract] . Entomological Society of Manitoba, Proceedings 39:21.
- Welch, D. S. 1953. The Dutch elm disease in urban and forest areas . Journal of Forestry 51641, 643-644.
- Welch, D. S., and D. L. Collins. 1940. Dutch elm disease and its control. Cornell University Extension Service, Bulletin 437. 19 p.
- Welch, D. S., and J. G. Matthysse. 1954. Protect your elms from Dutch elm disease! Cornell University College of Agriculture, Cornell-Recom . Trees, Shrubs, and Turf 1954:23.
- Welch, D. S., and J. G. Matthysse. 1955. Control of the Dutch elm disease in New York State. New York State College of Agriculture, Cornell University Extension Service, Bulletin 932. 14 p.
- Welch, D. S., W. H. Rankin, and P. A. Readio. 1945. Dutch elm disease control. Cornell University Extension Service, Bulletin 687. 15 p.
- Welch, H. E. 1963. Nematode infections. Pages 363-392 in E. A. Steinhaus, Insect pathology: an advanced treatise. Academic Press, New York and London. xiv + 689 p.
- Welch, R. C. 1968. Phloeosinus thujae (Perris) (Col Scolytidae) in Huntingdonshire . Entomologist's Monthly Magazine 104:64.
- Tomalak, M., H. E. Welch, and T. D. Galloway. 1988. Interaction of parasitic nematode Parasitaphelenchus oldhami (Nematoda: Aphenchoididae) and a bacterium in Dutch elm disease vector Hylurgopinus rufipes (Coleoptera: Scolytidae) . Journal of Invertebrate Pathology 52:301-308.
- Tomalak, M., H. E. Welch, and T. D. Galloway. 1989a. Effect of crowding on Sulphuretylenchus spp (Nematoda: Allantonematidae) in the hemocoel of their bark beetle hosts (Coleoptera: Scolytidae). Canadian Entomologist 121:821-822.
- Tomalak, M., H. E. Welch, and T. D. Galloway. 1989b. Nematode parasites of bark beetles (Scolytidae) in southern Manitoba, with descriptions of three new species of Sulphuretylenchus Ruhm (Nematoda: Allantonematidae) . Canadian Journal of Zoology 67:2497-2505.
- Tomalak, M., H. E. Welch, and T. D. Galloway. 1989c. Pathology of Aphelenchoides pityokteini (Nematoda: Aphelenchidae) in the malpighian tubules of Pityokteines sparsus (Coleoptera: Scolytidae) . Journal of Invertebrate Pathology 53:140-141.
- Tomalak, M., H. E. Welch, and T. D. Galloway. 1989d. Parasitism of Parasitorhabditis obtusa and Parasitorhabditis autographi (Nematoda: Rhabditidae) in the digestive tract of their bark beetle (Coleoptera: Scolytidae) hosts . Journal of Invertebrate Pathology 53:57-63.
- Welch, D. S., G. W. Herrick, and R. W. Curtis. 1934. The Dutch elm disease. Cornell University Extension Service, Bulletin 290. 19 p.
- Welch, R. C. 1968b. The Coleoptera of Monks Wood National Nature Reserve, Huntingdonshire, first supplement, 1965 . Entomologist's Gazette 19:9-20.
- Welch, R. C. 1968c. Some Coleoptera from Loch Lomond National Nature Reserve . Entomologists Monthly Magazine 104:119-122.
- Welch, R. C. 1970. The Coleoptera of Monks Wood National Nature Reserve, Huntingdonshire, second supplement, 1966-1968 . Entomologists Gazette 21:133-141.
- Welch, R. C. 1983. Coleoptera in the Inner Hebrides . Royal Society of Edinburgh, Proceedings 83B:505-529.
- Tomalak, M., H. Welch, and T. Galloway. 1990. Pathogenicity of Allantonematidae (Nematoda) infecting bark beetles (Coleoptera: Scolytidae) in Manitoba . Canadian Journal of Zoology 68:89-100.
- Welch, R. 1993. The Coleoptera of Monks Wood National Nature Reserve, Cambridgeshire (Vice County 31), Sixth Supplement, 1980-1990 . Entomologist's Gazette 44:275-283.