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|All Authors / Contributors:||
Harold Arthur Everett
|Notes:||The Pennsylvania State College bulletin, vol. XXXVIII, no. 134. August 18, 1944.
On cover: Authorized by the Council on research, the Pennsylvania state college.
|Description:||34 pages illustrations diagrams 23 cm.|
|Series Title:||Pennsylvania. State College. The Pennsylvania State College studies, no. 15.|
|Responsibility:||by Harold A. Everett.|