Lamberton, D. M. The theory of profit by D. M. Lamberton. - New York A. M. Kelley 1971. - vii, 211 p. illus. 23 cm. Includes bibliographical references. LCCN: ev 70001657 //r84 Subjects--Topical Terms: Profit LC Class. No.: HB601 / .L3 1971 Dewey Class. No.: 338.5