Tinbergen, J.
Observations on the planned provision of nitrogen fertilizer for the world / J. Tinbergen, L. H. Klaassen & E. H. Mulder - Leiden : H.E. Stenfert Kroese N.V. , 1956 - 45p. : ill. ; 22 cm.
Includes bibliographical references.
Fertilizers
Agriculture
631.8 / TIN
Observations on the planned provision of nitrogen fertilizer for the world / J. Tinbergen, L. H. Klaassen & E. H. Mulder - Leiden : H.E. Stenfert Kroese N.V. , 1956 - 45p. : ill. ; 22 cm.
Includes bibliographical references.
Fertilizers
Agriculture
631.8 / TIN