Problems of development and planning in the least developed among the developing countries report of the seventh Interregional Seminar on Development Planning, Addis Ababa, Ethiopia, 6-17 December 1971.
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| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
New York
United Nations
1973.
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| Gaiak: |