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Publication Extents

Not all publications have extents, not all extents are completely accurate
A national network of hydrological benchmarks
Luna Bergere Leopold
1962, Circular 460-B
We are engaged in great national programs of water control and development. An expanding population demands ever-increasing supplies of the natural resources which are to be found in or upon the landscape soil, water, minerals, food, timber, and fiber. By his works, by his extractions, man's mark upon his environment...