00503nam a2200169Ia 4500 0000006268 20251012174450.0 701218s1970 kyu b 001 0 eng G155.A1 G7 338.4/7/91 International travel--international trade, by H. Peter Gray. Lexington, Heath Lexington Books [1970] xiii, 264 p 23 cm. Includes bibliographical references. Balance of payments. Tourism. 4075 4075