Isaac Vollmer

Ohne Autor: Vollmer, Hermann. In: Derby, George/Saba, Mahoud/White, James T. (Hg.): The National cyclopædia of American biography. Being the history of the United States as illustrated in the lives of the founders, builders, and defenders of the republic, and of the men and women who are doing the work and moulding the thought of the present time. Edited by distinguished biographers, selected from each state. San Francisco: James T. White & Company 1961, S. 81⁠–⁠82, hier: S. 81.