National Research Council (U.S.) Research Information Service. (1929). Doctorates conferred in the sciences by American universities 1928-1929. National Research Council.
Chicago-Zitierstil (17. Ausg.)National Research Council (U.S.) Research Information Service. Doctorates Conferred in the Sciences by American Universities 1928-1929. Washington, D.C: National Research Council, 1929.
MLA-Zitierstil (9. Ausg.)National Research Council (U.S.) Research Information Service. Doctorates Conferred in the Sciences by American Universities 1928-1929. National Research Council, 1929.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.