Columbia University. Department of Physics(4)
Waldinger, Ernst (1896-1970)(3)
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Associated Music Publishers (New York)(2)
Deutschland (Bundesrepublik). Auswärtiges Amt(2)
Harcourt Brace Jovanovich (1970-1991)(2)
MacGraw-Hill Book Co. (New York, NY) (1909-2011)(2)