Jewish demography and statistics : bibliography for 1920 - 1960 = Dēmôgrafyā we-sṭātîsṭîqā šel hay-yehûdîm - Šmelṣ, ʿÛzzīʾēl O. (Verfasser) (The Hebrew Univ. of Jerusalem, Inst. of Contemporary Jewry, 1961)