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1

Denver, CO : U.S. Bureau of Land Management, National Science and Technology Center, 2003

Government Document Book

2

Conquest of the land through 7,000 years /

by Lowdermilk, W. C. (Walter Clay), 1888-1974
Washington, D.C. : U.S. Dept. of Agriculture, Natural Resources Conservation Service, 1999
Slightly rev.

Government Document Book

3

A legacy of conservation : 75 years helping people help the land in North Dakota, 1935-2010 /

[Washington, D.C.] : NRCS, 2010

Government Document Book

4

Model simulation of soil loss, nutrient loss, and change in soil organic carbon associated with crop production.

[Washington, D.C.] : U.S. Dept. of Agriculture, Natural Resources Conservation Service, 2006

Government Document Book

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