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Symposium on International Economic Co-operation, 1971, 26.-28.4.1971, Tokyo : theme: Spirit of international economic co-operation and world peace
Ballon, Robert J., (1971)
Investment planning in socialist economies
Saxena, R. B., (1984)
Problemy inwestycji wspólnych RWPG
Wilk, Kazimiera, (1979)