Lehigh

Manylion daliadau o Lehigh
Rhif Galw: 749.213 Z85zb

Carnegie Mellon

Manylion daliadau o Carnegie Mellon
Rhif Galw: NK2439 .Z64 B73 2000

University of Pennsylvania

Manylion daliadau o University of Pennsylvania
Rhif Galw: NK2439.Z64 B73 2000

West Chester

Manylion daliadau o West Chester
Rhif Galw: 749.213 Z85xb