Kaeckenbeeck, Georges (1892-1973). The international experiment of Upper Silesia : a study in the working of the Upper Silesian Settlement 1922-1937 / by Georges Kaeckenbeeck. - London : Oxford University Press, 1942. - XXXIX, [1], 867, [1] s., [2] k. tabl. : il. ; 25 cm. Subjects--Geographic Terms: