Books by Marilyn Walker:
Books in the extended shelves:
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Walker, Marilyn, 1949-: Wetland soils and vegetation, Arctic Foothills, Alaska (U.S. Dept. of the Interior, Fish and Wildlife Service, Research and Development, 1989), also by K. R. Everett, D. A. Walker, U.S. Fish and Wildlife. Research and Development, U.S. Fish and Wildlife, Walker Geobotanical Surveys, and U.S. Fish and Wildlife Service. Region 8 (page images at HathiTrust)
Find more by Marilyn Walker at your library, or elsewhere.