00432nam a2200157 a 450000100080000000500110000800800410001910000170006024500320007726000620010930000100017149000470018165000160022870000170024470000130026119342442012-09-20       1955    bl uuuu      00u1 u    #d1 aRAPER, A. F.  aGuide to agriculture U.S.A.  aWashington: United States Department of Agriculturec1955  a82 p.  a(Agriculture Information Bulletin, n. 30).  aAgricultura1 aRAPER, M. J.1 aSENF, C.