Leibenstein, Harvey. General X - efficiency theory and economic development X-efficiency theory and economic development Harvey Leibenstein - Oxford University Press New York 1978 1978 - x , 189 p. : ill. ; 21 cm. - Economic development series . Includes index ISBN: 019502379X. 0195023803pbk. Subjects--Topical Terms: Economic development.--HD LC Class. No.: HD82.L342