Residual effects of fertilizers
Bear, Firman E., Salter, Robert M.
Residual effects of fertilizers - Morgantown 1916 - 1-26 p. - Fertilizers West Virginia Agricultural Experiment Station. Technical Bulletin No. 160 .
Residual effects of fertilizers - Morgantown 1916 - 1-26 p. - Fertilizers West Virginia Agricultural Experiment Station. Technical Bulletin No. 160 .