"NPS Focus: Search page". National Register of Historic Places. National Park Service. Archived from the original(Enter: Ricketts, Clemuel, Mansion) on July 25, 2008. Retrieved April 11, 2010.
"Camp Information for SP-9-PA". Pennsylvania CCC Archive. Pennsylvania Department of Conservation and Natural Resources. Archived from the original on June 10, 2011. Retrieved April 11, 2010.
"NPS Focus: Search page". National Register of Historic Places. National Park Service. Archived from the original(Enter: Ricketts, Clemuel, Mansion) on July 25, 2008. Retrieved April 11, 2010.
"Camp Information for SP-9-PA". Pennsylvania CCC Archive. Pennsylvania Department of Conservation and Natural Resources. Archived from the original on June 10, 2011. Retrieved April 11, 2010.