00656nam a22001937a 4500003000800000005001700008008004100025040002100066082001500087100002200102245015800124260003600282300003300318365001300351490004500364500002000409650001000429700002300439BD-DhUL20150108182805.0150108s1944    us a|||| |||| 001 0 eng d  aBD-DhULcBD-DhUL  bCOCa631.5  aCox,Joseph Frank   aCrops :ba self-teaching course, based on Crop management and soil conservation /cby  Joseph Frank Cox, Lyman E. Jackson and edited by  P Alston Waring.  aWashington :bJ. Wiley,cc1944.  aix, 307 p. :bill. ;c19 cm.  aUS$b7.5  aUnited States War dept. Education manual  aIncludes Index.  2Crops  aJackson, Lyman E.