Edward L. Ullman’s 1957 study on commodity flows to study spatial interaction and regional economic structure was based on economy of which country?
A. Europe
B. U. S. A.
C. U. K.
D. Australia
Answer:B
Edward L. Ullman’s 1957 study on commodity flows to study spatial interaction and regional economic structure was based on economy of which country?
A. Europe B. U. S. A. C. U. K. D. Australia