Author
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Popovich, John
1
Richards, Henry Melchior Muhlenbert
1
Roberts, Charles Rhoads
1
Rouse, Parke, 1915-
1
Schantz, F.J.F.
1
Sheppard, Walter Lee, 1911-
1
Smith, Clifford Neal
1
Societatea Banateana-Vasile Alecsandri
1
United States. National Resources Committee. Science Committee
1
Wecken, Ernst
1
Welcome Society of Pennsylvania
1
Wilson, Edwin Bidwell, 1879-1964
1
Wokeck, Marianne Sophia, 1947-
1
Wyoming Historical and Geological Society
1
Yoder, Don
1
Yoder, Donald Herbert
1