TY  - BK
AU  - Nichols,F.E.
AU  - Campbell,J.K.
AU  - Duff,B.
TI  - Agricultural equipment development research for tropical rice cultivation -- 1973
T2  - Semiannual Progress Report
PY  - 1973///
CY  - Los Baños, Laguna (Philippines)
PB  - IRRI, 
ER  -