A primary source is a document or other sort of evidence written or created during the time of study; primary sources offer an eyewitness view of a particular event.
Types of primary sources include: addresses OR correspondence OR documents OR "oral history" OR diaries OR speeches OR letters OR minutes OR interviews OR journals OR narratives OR memoirs OR images OR "news film" OR autobiographies OR official records OR photographs.
(You could copy this list and paste it into one of your search box lines...)
Image source: Primary source document--portion of contract agreement between G. W. Miles Rigor and Thomas R. Vickroy by which LVC was brought into being. Paul A. W. Wallace. Lebanon Valley College: A Centennial History.
For original primary source documents, letters, manuscripts, etc., you'll need to visit library archives. A large portion of archival materials are not available electronically.
Newspaper articles from the time period you're researching may be found in the LVC newspapers, Early American Newspapers, or the New York Times Historical.
Magazine articles published from the time period may be found in The Valley Magazine or Readers' Guide Retro.
Other primary source information may be gleaned from LVC Yearbooks or LVC Catalogs.
Image source: LVC Faculty. 1904 Bizzare.
Image source: Flying Dutchmen. The Quittapahilla, 1954.