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Soil survey of Louisa County, Iowa /
United States Department of Agriculture, Soil Conservation Service ; in cooperation with Iowa Agriculture and Home Economics Experiment Station ... [et al.].

APA Citation

Brown, M. D., United States. Soil Conservation Service. (1987). Soil survey of Louisa County, Iowa. [Washington, D.C.?]: The Service.

MLA Citation

Brown, Melvin D, and United States. Soil Conservation Service. Soil Survey of Louisa County, Iowa. [Washington, D.C.?]: The Service, 1987.

Warning: These citations may not always be complete (especially for serials).