00609nam a2200205Ia 4500 0000008115 20251012174502.0 720515s1973 njua b 001 0 eng 0134739183 9780134739182 HF1411 .H38 1973 382 International trade; theory and empirical evidence [by] H. Robert Heller. 2d ed. Englewood Cliffs, N.J., Prentice-Hall [1973] xiv, 236 p illus 24 cm. Includes bibliographies. International trade. Commerce international. 4505 4505