nam a22 7a 4500 61020 61020 WUSLLib 180905b ||||| |||| 00| 0 eng d 955974853X English 631.584 WIJ Wijeratne, Mahinda 11372 Farmer field school an agricultural dissemination technique Kamburupitiya Mahinda Wijerathna 2007 2007 vi,40 p. 21cm. Agriculture 3396 Farmer field 11373 farming 11374 ddc L 0 0 ddc 0 0 LEN MKDL MKDL LEN 2018-09-05 0 631.584 WIJ 69541 2018-09-05 00:00:00 2018-09-05 L