Published References

• Cooledge, Harold N. Jr. Samuel Sloan: Architect of Philadelphia 1815-1884. (Philadelphia: University of Pennsylvania Press, 1986)., p. 168
  Links: View citation information
  Client/Project Name: Keen Building (given later)
  Architect Referenced: Sloan, Samuel (1815-1884)
   
• Cooledge, Harold N. Jr. Samuel Sloan: Architect of Philadelphia 1815-1884. (Philadelphia: University of Pennsylvania Press, 1986)., p. 168
  Links: View citation information
  Client/Project Name: Keen Building
   
• Historic American Buildings Survey (HABS) Collection at the Library of Congress
  Links: View citation information
  Client/Project Name: Chestnut Street Area Study, Commercial Buildings (HABS PA-1402)
   
• Chiumenti, Ralph, The Cast-Iron Architecture of Philadelphia's Old City, Philadelphia, 1975., p. pl. 4B
  Links: View citation information
  Client/Project Name: J. Howell & Co. / Keen Building
   
• Rae, Julio H. Rae's Philadelphia Pictorial Directory & Panoramic Advertiser. Philadelphia: Julio H. Rae, 1851., p. Plate 2, North Side
  Links: View citation information
  Client/Project Name: Plate 2, North Side
   
• Webster, Richard J., Philadelphia Preserved. Philadelphia: Temple University Press, 1976., p. 66
  Links: View citation information | Buy this book at Amazon.com
  Client/Project Name: Keen Building
   
• Pennsylvania Historical and Museum Commission Cultural Resources Database
  Links: View citation information
  Client/Project Name: Keen Building
   
• Philadelphia Register of Historic Places (Imported)
   
• HABS/HAER/HALS list for Philadelphia and surrounding counties (imported November 8, 2001)
   

Drawings, Photos, Papers, etc.

• Athenaeum of Philadelphia - Baxter's Panoramic Business Directories
  Holding Name: No. 20, December 1879, 200 Block Chestnut St., North Side
  Quantity: 1, Call Number: BAX1879020
   
• Philadelphia Historical Commission - Philadelphia Historical Commission Files
  Holding Name: 217-219 Chestnut Street
  Quantity: 1 folder (incl. 1 photograph
   
• Philadelphia Historical Commission - Philadelphia Historical Commission Files
  Holding Name: 223-227 Chestnut Street
  Quantity: 2 folders (incl. 37 photographs)
   
• Philadelphia Historical Commission - Philadelphia Historical Commission Files
  Holding Name: Chestnut Street - 200 Block
  Quantity: 2 folders (incl. many photographs)
   

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