Biodiversity Heritage Library
By "Penkal, Russell F. "
Assessment and requirements of sauger and walleye populations in the lower Yellowstone River and it's [sic] tributaries / by Russell F. Penkal.
By: Penkal, Russell F. - Montana.
Publication info: [Helena?] :Dept. of Fish, Wildlife and Parks,
Contributed by: Montana State Library (archive.org)