Author
Brückner, Martin, 1963-
1
Gesellschaft für Erdkunde zu Berlin
1
Haskell, Daniel C. 1883-1968
1
Kretschmer, Konrad, 1864-
1
Lessing J. Rosenwald Reference Collection (Library of Congress)
1
New York Public Library
1
Omohundro Institute of Early American History & Culture
1
Stokes, I. N. Phelps 1867-1944
1