242
242
Balzak S. S., Vasyutin V. F., Feigin Y. G. Economic Geography of the USSR. New York: Macmillan Co., 1949. P. 192,193, 250.
242
Balzak S. S., Vasyutin V. F., Feigin Y. G. Economic Geography of the USSR. New York: Macmillan Co., 1949. P. 192,193, 250.