00517nam a2200157 a 450000100080000000500110000800800410001910000220006024500980008226000930018065000160027365300150028965300160030470000220032070000170034216582002011-10-28       2009    bl uuuu     u00u1 u    #d1 aSOUZA, G. da S. e  aAn efficiency approach for analyzing the major agricultural economies.h[electronic resource]  aIn: INTERNATIONAL CONFERENCE ON DATA ENVELOPMENT ANALYSIS, 7., 2009, Philadelphia.c2009  aagriculture  aEfficiency  aFood crisis1 aMOREIRA, T. B. S.1 aGOMES, E. G.