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MLA

National Soil Tilth Laboratory (U.S.). "Walnut Creek Watershed : Ceap Plans and Progress." ,

APA

National Soil Tilth Laboratory (U.S.), N. Soil Tilth Laboratory (U.S.). (2005). Walnut Creek Watershed : CEAP plans and progress.

Chicago

National Soil Tilth Laboratory (U.S.) "Walnut Creek Watershed : CEAP plans and progress" (2005):