00000cam a22000004a 4500 UP-1685594773861419458 Buklod 20250218163744.0 j|||||||||||||| | ta 070906s1990 xx d r |||| u| (iLib)UPBAG-00000024761 BAG rda eng S 494.5 S95 B37 Basic elements of the farming systems approach to research and extension William D. Dar, editor. [S.l.] Bureau of Agricultural Research 1990. 104 leaves ill. 28 cm. Photocopy. Includes bibliographical references. Agricultural systems Philippines Research. Agriculture Research Philippines. Dar, William D. FI UPBAG UPBAG-MAIN S 494.5 S95 B37 Book