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*Chairman,
Paleobotanical Section, Botanical Society of America, 1982
*Secretary/Treasurer, Paleobotanical Section, Botanical Society of America,
1986-1989
*Schuchert Award Committee, Paleontological Society, 1991-1993
*Conant Award Committee, Botanical Society of America, 1999.
*Symposium Awards Committee, Paleobotanical Section, Botanical Society
of America, 1999.
*President’s Discretionary Funds Committee, Botanical Society
of America, 2000.