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DeGraaf, R., M. Yamasaki, W. B. Leak, and A. M. Lester. 2006. Technical Guide to Forest Wildlife Habitat Management in New England. University of Vermont Press and University Press of New England, Burlington, Vt. 305 p.

Leak, William B.; Riddle, Jane R. 1979. Why trees grow where they do in New Hampshire Forests. NE-INF-37-79. Broomall, Pennsylvania: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 26p.

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