Microfiche. <1989>-2003. Washington, D.C. : U.S. G.P.O. 1997-2004. microfiches : negative.
Vols. for <1989-> issued by: U.S. Dept. of Agriculture, Forest Service, Forest Pest Management; <1995-> by: the Dept.'s Forest Health Protection.
Description based on: 1980; title from cover.
Latest issue consulted: 2006.