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Prace Mat.-Fiz.
Prace Matematyczno-Fizyczne. Warszawa. Polish, French, German, English.
Journal
http://matwbn.icm.edu.pl/spis.php?wyd=3
Continued as: Pr. Mat.; Ann. Soc. Math. Pol., Ser. II, Wiad. Mat.
No longer indexed. not published during 1940-1948
