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MLA

Hansen, LeRoy, Marc Ribaudo, and United States Department of Agriculture. Economic Research Service. Economic measures of soil conservation benefits. , 2008.

APA

Hansen, LeRoy, Ribaudo, Marc, and United States Department of Agriculture. Economic Research Service. (2008). Economic measures of soil conservation benefits. .

Chicago

Hansen, LeRoy., Marc Ribaudo, and United States Department of Agriculture. Economic Research Service. Economic measures of soil conservation benefits. , 2008.