Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
73 630.7 IRB406 O19061
Iowa State College., Agricultural Experiment Station. Significance of soil organic phosphorus to plant growth Iowa: [s.n.], 1954 - (Research Bulletin ) * Administrative report * Series