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  1. Five year update of the programmatic environmental impact statement : the grizzly bear in northwestern Montana, 1986-1990 /
    By: Dood, Arnold R. - Pac, Helga Ihsle, - Montana.
    Publication info: [Helena] :Montana Department of Fish, Wildlife and Parks,[1993]
    Contributed by: Montana State Library (archive.org)
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  2. Population ecology of mule deer with emphasis on potential impacts of gas and oil development along the east slope of the Rocky Mountains, northcentral Montana /
    By: Pac, Helga Ihsle, - Montana. - United States.
    Publication info: [Helena?, Mont. :The Dept.?,1982?].
    Contributed by: Montana State Library (archive.org)
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  3. Some population characteristics of the northern Yellowstone bison herd during the winter of 1988-1989 / prepared by Helga Ihsle Pac [and] Kevin Frey.
    By: Pac, Helga Ihsle, - Frey, Kevin. - Montana.
    Publication info: [Helena?] :Montana Department of Fish, Wildlife & Parks,[1991]
    Contributed by: Montana State Library (archive.org)
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