tinbergen, j. (1964). development planning: The sector phase with different gestation periods. the institute of national planning.
Chicago-viite (17. p.)tinbergen, j. Development Planning: The Sector Phase with Different Gestation Periods. cairo: the institute of national planning, 1964.
MLA-viite (9. p.)tinbergen, j. Development Planning: The Sector Phase with Different Gestation Periods. the institute of national planning, 1964.
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