TY  - BK
AU  - Khan,A.U.
AU  - Duff,B.
AU  - Nichols,F.E.
TI  - Agricultural equipment development research for tropical rice cultivation -- 1972
T2  - Semiannual Progress Report
PY  - 1972///
CY  - Los Baños, Laguna (Philippines)
PB  - IRRI, 
ER  -