A study of farmers' attitudes toward the use of fertilizer, for the National Plant Food Institute - National Analysts, inc.; National Plant Food Institute ([s.l. : s.n.], 1957)
[1]. Analytic report.-- [2]. Tables--national totals.-- [3]. Tables--North central region.
Vol. 2- : chiefly tables.
Mode of access: Internet.
Keywords: Fertilizers