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7 works · 12 duplicate files collapsed
BOOKS
Richard M. Pearl
Archibald Geikie
William C. Putnam
Thomas C. Chamberlin & Rollin Daniel Salisbury
Albert Perry Brigham
Geological Survey of California.
Catherine Elizabeth Orr
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Robert E. Boyer and P. B. Snyder
I O Evans
J. Gregory
Frank Harold Trevor Rhodes
Valer'ian Aleksandrovich Kipriianov
Leon E. Long