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Presidential Addresses
WASHINGTON, D.C.
Meeting 682, followed by Annual meeting 57
Cosmos Club
Wednesday, December 14, 1949
James Steele Williams
,
President
Ralph Erskine Van Alstine
,
Meeting Secretary
James Steele Williams
—
USGS
—Boundaries between geologic systems, illustrated by late Paleozoic examples.
(Presidential Address).
Attendance: 146
Meeting Secretary's Minutes
Additional minutes
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