Hella, Karl Neil, Surplus labor and the production of nonmarket goods in rural Vietnam [microform] / by Karl Neil Hella. - Ann Arbor, Mich. : University Microfilms International, 1979. - 3 microfiches ; 11 x 15 cm. Thesis (Ph.D)-Washington University, 1978 Subjects--Topical Terms: Labor supply--Vietnam. Subjects--Geographic Terms: Vietnam--Rural conditions.