1. Bartholomew , R. P. D. A. Hinkle K. Engler 1954 Effect of rainfall characteristics and soil management practices on soil and water losses in northwest Arkansas Arkansas Agric. Exp. Stn. Bull. 548
2. Bartholomew , R. P. D. A. Hinkle K. Engler 1955 Soil and water losses in southwest Arkansas as influenced by rainfall characteristics and soil management practices Arkansas Agric. Exp. Stn. Bull. 550
3. Effects of zinc fertilizer on corn yield in southeastern North Dakota;Bauer;North Dakota Agric. Exp. Stn. Farm Res.,1968
4. How serious is soil erosion?;Baver;Soil Sci. Soc. Am. Proc.,1950