Author
Evelina López Antonetty Puerto Rican Research Collection (New York, N.Y.)
2
Roy, J.-Edmond 1858-1913
2
Balch Institute for Ethnic Studies
1
Bentley Historical Library
1
Carnegie Institution of Washington
1
Cornell University. New York Historical Resources Center
1
Fernow, Berthold, 1837-1908
1
Griffin, Mary F.
1
Historical Society of Pennsylvania
1
Kielman, Chester V.
1
Learned, Marion Dexter, 1857-1917
1
Library of Congress European Historical Mission.T
1
Library of Congress. Legislative Reference Service
1
New York (State) Council
1
Robertson, James Alexander, 1873-1939
1
Spain. Ministerio de Asuntos Exteriores
1
Tansill, Charles Callan, 1890-1964
1
United States. National Historical Publications Commission
1
University of Texas at Austin. Archives
1
Van Laer, Arnold J. F. 1869-1955
1