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Document Type

Yellowstone National Park Report

First Page

153

Last Page

158

Abstract

This report concerns the current investigation of effects of selected environmental factors on numbers of pocket gophers (Thomomys talpoides) in Pelican Valley, Yellowstone National Park, Wyoming. The study is being supported by the University of Wyoming/National Park Service Research Center. I wish to express my appreciation to the following individuals for their contributions to the study: Dr. Robert Moore, Montana State University, who directed the study and aided in the preparation of this report; Drs. Gerald Nielson, Clifford Montagne and Lawrence Munn, Montana State University, for aid in classification and analysis of soils from the study area; Dr. Theodore Weaver, Montana State University, for aid in analysis of vegetation data; Dr. John Taylor and Mr. Wayne Leininger, Montana State University, for assistance with aerial photography techniques; Mr. Roger Rudolph, Subdistrict Ranger, for his cooperation.

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