Phosphates in Massachusetts agriculture importance, selection and use
Brooks, W.P.
Phosphates in Massachusetts agriculture importance, selection and use - Amherst 1915 - 131-167 p. - Agriculture Massachusetts Agricultural Experiment Station. Bulletin No. 162 .
Phosphates in Massachusetts agriculture importance, selection and use - Amherst 1915 - 131-167 p. - Agriculture Massachusetts Agricultural Experiment Station. Bulletin No. 162 .