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Conservation of natural resources -- United States -- Congresses
1
E-book
1957

The conservation of natural resources : a series of lectures delivered at the institution




London [England] : The Institution of Civil Engineers, 1957

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Conservation of natural resources -- United States -- Congresses -- History -- 20th century
2
E-book
2016

Theodore Roosevelt, Conservation, and the 1908 Governors' Conference


Dorsey, Leroy G., 1959- author.
First edition
[Place of publication not identified] : Texas A & M University Press, 2016

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