Editore: Fish and Wildlife Service, Washington, DC, 1982
Da: Ray Boas, Bookseller - Established 1980, Walpole, NH, U.S.A.
PB. B&W illustrations (illustratore). 191pp Wildlife Research Report 14 - Symposium held at The Pennsylvania State University, University Park, Pennsylvania, 28-30 October 1980. good, wraps (softcover) owner's name.