The transition from subsistence to commercial family farming in North Sumatra
Penny, David Harry, 1930-
The transition from subsistence to commercial family farming in North Sumatra [microform] / by David Harry Penny - Ann Arbor, Mich. : University Microfilms International, 1965 - 1 microfilm reel : positive ; 35 mm.
Thesis (Ph.D) - Cornell University, 1964
Agriculture--Indonesia
Indonesia--Agriculture
The transition from subsistence to commercial family farming in North Sumatra [microform] / by David Harry Penny - Ann Arbor, Mich. : University Microfilms International, 1965 - 1 microfilm reel : positive ; 35 mm.
Thesis (Ph.D) - Cornell University, 1964
Agriculture--Indonesia
Indonesia--Agriculture
