| Who What Where WhenWHEREWHEN | REFINE  Browse All : Physical by U.S. Department of Agriculture
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       Author Marschner, Francis J. Full Title (Section Title Page) Atlas of American Agriculture. Land Relief. Contribution of the Bureau of Agricultural Economics, A.G. Black, Chief. By F.J. Marschner, Research Assistant. United States Government Printing Office, Washington: 1936. Publisher U.S. Department of Agriculture 
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