Many primary or historical sources can be found in archival collections, however as first-hand accounts from specific events, primary sources can also be found in a variety of formats and places beyond the archives. For example, primary sources can be:
If you have to make a research visit, contact the archives and speak with an archivist before you go!
To learn more about using an archive, take a look at the Society of American Archivists (SAA) Guide "Using Archives: A Guide to Effective Research."
CHINESE CRUSH FOE IN CHIHKIANG ZONE. (1945, May 11). New York Times (1923-Current File) Retrieved from http://search.proquest.com/docview/107140388?accountid=13701
Can a Source be Primary and Secondary?
Simply put, yes. For example a documentary about World War II could be used as both a primary or secondary source. It could be used as a primary source if it has first-hand accounts or if you are studying the art of documentary. It could also be used as a secondary source because it uses primary source material to analyze an event.
Not sure if what you are looking at is primary or secondary?