- Mogren, E. W. 1955a. A study of some aspects of susceptibility of ponderosa pine to attack by Black Hills beetle. Unpublished dissertation, University of Michigan, Ann Arbor. 111 p.
- Mogren, E. W. 1955b. A study of some aspects of susceptibility of ponderosa pine to attack by Black Hills beetle (Dendroctonus ponderosae) . Dissertation Abstracts 15:1477.
- Mogren, E. W. 1956a. Resistance of ponderosa pine to Black Hills beetle . Society of American Foresters, ProceeoV ings 1955:61-63.
- Mogren, E. W. 1956b. Silvical factors influencing resistance of ponderosa pine to Black Hills beetle (Dendroctonus ponderosae) attack . Society of American Foresters, Proceedings 1955:61-63.
- Mogren, E. W. 1958. Local cord-volume table for beetle-killed Engelmann spruce on the Routt National Forest, Colorado . Colorado College of Forestry and Range Management, Research Note 8:1-3.