Guide to the Manuscript Collections of the Historical Society of Pennsylvania.;Shipbuilding at Cramp and Sons: A History and Guide to Collections of the William Cramp and Sons Ship and Engine Building Company (1830-1927) and the Cramp Shipbuilding Company (1941-46) of Philadelphia.by Gail E. Farr; Brett F. Bostwick; Merville Willis;John Lenthall, Naval Architect: A Guide to Plans and Drawings of American Naval and Merchant Vessels, 1790-1874.by Gail E. Farr; Brett F. Bostwick;The Swift Progress of Population: Documentary and Bibliographical Study of Philadelphia's Growth, 1642-1859.by Susan E. KleppReview by: Philip Scranton · The Journal of American History · 1993

The Art of Bacterial WarfareFinlay, B. Brett · Scientific American · 2010

Pre-Columbian Surface MetallurgyLechtman, Heather · Scientific American · 1984

A Revolution in ElectronicsRidenour, Louis N. · Scientific American · 1951

The Lost Cities of PeruSchaedel, Richard P. · Scientific American · 1951

LettersSchaedel, Richard P. · Scientific American · 1951

Science and the CitizenWalford, Lionel A. · Scientific American · 1951

Hybrid CornMangelsdorf, Paul C. · Scientific American · 1951

Heart MuscleMangelsdorf, Paul C. · Scientific American · 1951