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East-West trade and the GATT system
Kostecki, Michel, (1979)
Future United States Foreign Trade Policy : report to the president
(1969)
Zölle, Einfuhrnebenabgaben und Außenhandel
Lohse, Rolf, (1968)
Polityka handlowa Polski wobec krajów unii europejskiej, EFTA i CEFTA wybrane aspekty
Płowiec, Urszula, (1995)
Polish foreign trade problems in the 1990's
Płowiec, Urszula, (1994)
State aid in Poland : present situation and the expected changes under the Europe Agreement
Płowiec, Urszula, (1993)