Adolph Knopf (1882-1966): on staff of U.S. Geological Survey from 1906-1945; professor of geology at Yale University, 1920-1951; professor emeritus from 1951; author of various books and articles.
From the description of Adolph Knopf papers, 1916-1942 (inclusive), 1916-1919 (bulk). (Unknown). WorldCat record id: 702168775
From the guide to the Adolph Knopf papers, 1916-1942, 1916-1919, (Manuscripts and Archives)