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Floyd Swink and Teaching Environmental Awareness participants at the Indiana DunesMay 4 1981
Armstrong, Patricia K.
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The Morton Arboretum Prairie Restoration SignDecember 12 1980
Armstrong, Patricia K.
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Volunteers Planting Seed and Spreading Chaff October 25 1981
Armstrong, Patricia K.
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Bill Thorton raking Prairie HayOctober 1985
Armstrong, Patricia K., Armstrong, Patricia K.
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Sandy Matalis at Prairie Volunteer Fall FestivalSeptember 27 1981
Armstrong, Patricia K.
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George Birmingham and Margaret Jonah Working on Prairie TrailJuly 1981
Armstrong, Patricia K.
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Liatris spicata (L.) Willd. (marsh blazing star), habitat
August 8 1981
Armstrong, Patricia K.