The land renewed : the story of soil conservation by William R. Van Dersal and Edward H. Graham. Van Dersal, William Richard. 1907- Graham, Edward H. (Edward Harrison), 1902-1966, joint author. Soil conservation United States. Erosion. Soil erosion United States. S623 .V3 631.45 DEL New York : Oxford university press, c1946. c1946. 1946 Text 109 p. eng United States. United States.