00385nam a2200133 a 450000100080000000500110000800800410001910000160006024500420007626000670011830000110018549000300019665000250022610200072019-09-12       1980    bl uuuu     u00u1 u    #d1 aEATON, D.J.  aA systems analysis of grain reserves.  aWashigton (USA): United States Department of Agriculturec1980  a124 p.  a(Tecnical Bulletin; 1611)  aANALISIS DE SISTEMAS