"Some things the experiment stations have found out about organic matter, green-manures, and the use of cover crops."; "Dustman, Robert B. (Robert Barclay), 1892-"; "Manures.", "Soils.", "Cover crops."; "Dustman, Robert B. (Robert Barclay), 1892-"; "1919"; "

Serial issue. Issued as: West Virginia University. College of Agriculture. Extension Department. Agricultural summary, no. 9 (1919:Jan.).

"; ""; "P19007"; "pec"; "Soils.", "Cover crops.", "Manures."; "14256"; .