926 resultados para Conservation of forests and aquatic ecosystems


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"Issued Jan. 1932 ; Rev. Jan. 1939 ; Slightly rev. Oct. 1940."

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Includes bibliographical references.

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"This publication may be designated as FP-4l."

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Published also as thesis (Ph.D) University of Illinois, 1925.

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"Appendix II. The Northwest game act" : p. [165]-169.

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