Vanek, J., & Billsborrow, R. (1967). Estimating foreign resource needs for economic development: Theory, method, and a case study of Colombia. McGraw-Hill.
Chicago-viite (17. p.)Vanek, Jaroslav, ja Richard Billsborrow. Estimating Foreign Resource Needs for Economic Development: Theory, Method, and a Case Study of Colombia. New York: McGraw-Hill, 1967.
MLA-viite (9. p.)Vanek, Jaroslav, ja Richard Billsborrow. Estimating Foreign Resource Needs for Economic Development: Theory, Method, and a Case Study of Colombia. McGraw-Hill, 1967.
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