00511nam a2200181Ia 4500 0000006018 20251012174446.0 721027s1967 nyu b 000 0 eng HD4901 .P5 1967 331 Introduction to labor economics [by] Orme W. Phelps. 4th ed. New York, McGraw-Hill [1967] xv, 555 p 23 cm. Includes bibliographies. Labor economics. Labor economics United States. 3927 3927