Szlajfer, Henryk Economic surplus and surplus-value : an attempt at comparison Henryk Szlajfer - Dar es Salaam : University of Dar es Salaam , 1979. - 61p. : 33 cm. - Occational Paper ; 78.3 . Subjects--Topical Terms: Economic policyEconomic surplus Subjects--Geographic Terms: LC Class. No.: EAF PAM QTO HC12.E4