Description
Item Description:Originally presented as: Thesis (Ph.D.)--University of Pennsylvania 1973.
Physical Description:1 online resource (xvi, 187 pages) : illustrations (black and white), maps (black and white).
Bibliography:Includes blbliographical references and index.
ISBN:9781407343761
1407343769
9781407314198
140731419X
DOI:10.30861/9781407314198