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Volume 7, Number 4
July 1932

National Park Service
Grand Canyon National Park
Grand Canyon Natural
History Association

This publication is issued monthly for the purpose of recording observations and of making known the results of research and scientific investigation in the Grand Canyon region in the fields of natural history, history and related subjects. It is published by the Natural History Association for the Grand Canyon National Park. Membership in this Association is $1.00 per year and includes a subscription to Nature Notes. Additional copies of Nature Notes may be obtained at 10¢ each by addressing The Grand Canyon Natural History Association, Grand Canyon, Arizona.

M. R. Tillotson,
Edwin D. McKee,
Park Naturalist

Table of Contents

Game Survey of the Walhalla Plateau
     Ranger Perry E. Brown

Concerning the Age of the Grand Canyon
     Park Naturalist E. D. McKee

Food for the Hawk
     Ranger Naturalist R. A. Redburn

     Ranger Naturalist Clyde C. Searl

Field Observations
     Naturalist Staff

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