00311nam a2200133Ia 450000500170000008000180001710000220003524500300005726000290008730000140011658300180013094200120014899900170016020260716043615.0 a07.03.01 G934 aGuerra, Guillermo aFarm management hand-book bIICAaSan JoséCRc1982 ax, 323 p. c9/26/05kJOYD cMmG934 c50724d50724