Princeton University: An Interactive Campus History, 1746-1996: Includes building history, campus developments, key players and expansion periods.
Princeton University Current Campus Plan: Issued by the University Architect's Office.
Campus Architecture: Collections at PUL: A resource list of related materials in the Library's Archives, Rare Books, and Special Collections.
PU Historical Photographs: Grounds and Buildings, 1850s-1940s.
Grounds and Buildings category on the Mudd Library blog (see specific posts by Mudd staff)
Cantor, Laurel M. 1983. “The Gargoyles of Princeton University.”
Cantor, Laurel Masten. 1985. The Spires of Princeton: An Architectural Tour of the Campus