TY  - BOOK
AU  - Penny,David Harry
AU  - Simandjuntak,S.B.
TI  - The role of efficiency research in the improvement of estate management
AV  - S561 .P38
PY  - 1962///?]
CY  - [Medan?
KW  - Farm management
KW  - Agriculture
KW  - Economic aspects
KW  - Research
N1  - At head of title: Planters Conference, 1962; Cover
ER  -