Some population characteristics of the northern Yellowstone bison herd during the winter of 1988-1989 Pac, Helga Ihsle, 1955- creator Frey, Kevin. contributor Montana. Department of Fish, Wildlife, and Parks contributor text book [Helena?] Montana Department of Fish, Wildlife & Parks [1991] 1991
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ENG "May 1991." American bison Management Yellowstone National Park 599.643 https://www.biodiversitylibrary.org/bibliography/45792 38585026 10.5962/bhl.title.45792 Mt