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by Flora of North America Editorial Committee; Barkworth, Mary E.; Capels, Kathleen M.; et al.
by Edited by Michael H. Long
by Doughty, Catherine J.; Long, Michael H.
by Long; Michael H.
by Long, Michael G.; Sadd, Tracy Wenger
by Long, Michael S.; Bryant, Thomas A.
by Long, Michael
by Long, Eric C.; Baldwin, Michael J.
by Long, Michael H.; Doughty, Catherine J.