TY  - BOOK
AU  - Penny,David Harry
TI  - The transition from subsistence to commercial family farming in North Sumatra
PY  - 1965///
CY  - Ann Arbor, Mich.
PB  - University Microfilms International
KW  - Agriculture
KW  - Indonesia
N1  - Thesis (Ph.D) - Cornell University, 1964
ER  -