Columbia subject headings:
Competition--Poland--Periodicals.
Poland--Economic conditions--Periodicals.
Poland--Foreign economic relations--Periodicals.
Technological innovations--Economic aspects--Poland--Periodicals.
Harvard subject headings:
Princeton subject headings:
Competition--Poland--Periodicals.
Poland--Economic conditions--Periodicals.
Poland--Foreign economic relations--Periodicals.
Technological innovations--Economic aspects--Poland--Periodicals.