Source: Res. Pap. NE-410. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 3p.
Gansner, David A.; Herrick, Owen W.; White, William B. 1978. Economic Analysis of the Gypsy Moth Problem in the Northeast: IV. Forest Stand Hazard Ratings for Gypsy Moth. Res. Pap. NE-410. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 3p.