- LaGasa, E., M. M. Furniss, and H. Kamping. 1997. 1996 Washington state port area exotic bark beetle survey -- a Lindgren trap, multiple lure detection survey for Tomicus piniperda, Ips typographus, Hyalastes opacus, and other exotic species. 6 pp..
- LaGasa, E., M. Furniss, and H. Kamping. 1997. 1996 Washington state port area exotic bark beetle survey — a Lindgren trap, multiple lure detection survey for Tomicus piniperda, Ips typographus, Hylastes opacus, and other exotic species. Washington State Department of Agriculture, Laboratory Services division, 1996 Entomology Project Report. 6 pp.