Essential price theory / Albert M. Levenson and Babette S. Solon. Levenson, Albert Murray. Solon, Babette S. jt. aut. Prices. HB221 .L53 1971 338.52 LEE Includes index New York : Holt, Rinehart and Winston, 1971. 1971. 1971 Text viii, 344 p. : eng