College and Universities - University of Pittsburgh - Students gather around the engine to answer questions not only on laboratory work but also on the lectures. The receive a grade everyday on laboratory work and another on the quiz
Summary
College and Universities - University of Pittsburgh
Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description
Tags
Date
1917 - 1918
Source
The U.S. National Archives
Copyright info
No known copyright restrictions