Reference:Oettingen1992a
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Verbatim text: Oettingen, S. L. 1992. Small Whorled Pogonia (Isotria medeoloides) Recovery Plan: First Revision. Washington.
Author: Oettingen, S.L.
Year: 1992
Title: Small Whorled Pogonia (Isotria medeoloides) Recovery Plan: First Revision