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By "Opper, Richard Henry, 1952-"
For the sake of the creek : land and water use in the Rock Creek Basin & the effort to preserve the resource / prepared for the Rock Creek Advisory Council by the Montana Watercourse ; written by Margaret L. Knox, with assistance from Susan Higgins, Richard Opper.
By: Knox, Margaret L. - Higgins, Susan. - Opper, Richard Henry, - Montana Watercourse. - Rock Creek Advisory Council.
Publication info: Bozeman, Mont. :Montana Watercourse,1991.
Contributed by: Montana State Library (archive.org)