na INLIS000000000001895 ing 0-85199-545-4 0010-0923000262 628.1'684 AGR Anonim Agriculture,Hydrology and Water Quality London : Library of Congress Cataloging-in-Publication Data, 2002 502 hlm. 3,6 cm C - Education, extension, and advisory work/Pendidikan, penyuluhan pertanian, dan dokumentasi MFN2192