The Harkness collection in the Library of Congress :
calendar of Spanish manuscripts concerning Peru, 1531-1651.
[prepared by Stella R. Clemence].
APA Citation
Library of Congress. Manuscript Division., Harkness, E. Stephen., Clemence, S. Risley. (1932). The Harkness collection in the Library of Congress: calendar of Spanish manuscripts concerning Peru, 1531-1651. Washington: United States Govt. Print. Off.
MLA Citation
Library of Congress. Manuscript Division, Edward Stephen Harkness, and Stella Risley Clemence. The Harkness Collection In the Library of Congress: Calendar of Spanish Manuscripts Concerning Peru, 1531-1651. Washington: United States Govt. Print. Off, 1932.
Warning: These citations may not always be complete (especially for serials).