Smithsonian Institution Resource Information System
http://www.siris.si.edu/
Once inside this catalogue, choose to Search Archives. Once at the Archives page, click on Archives Center, National Museum of American History. Type in Victor Ochoa in the search terms box and hit Enter.

National Postal Museum Branch, Smithsonian Institution Library
http://www.si.edu/postal/library/library.html

National Postal Museum, Smithsonian Institution Library
http://www.si.edu/organiza/museums/postal/start.htm.

Center for Folklife Programs and Cultural Studies
http://www.si.edu/folklife/

Smithsonian Tropical Research Institute
http://www.si.edu/organiza/centers/stri/stri.htm