The Harbinger Harbinger, (Westv. Ill.) Newsletter of the Illinois Native Plant Society Illinois Native Plant Society. creator text series [S.l.] Illinois Native Plant Society 1985- 1985 Quarterly
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ENG Botany Illinois Periodicals 333 Southern Illinois Native Plant Society. Harbinger 14694937 sn88012064 https://www.biodiversitylibrary.org/bibliography/119848 1094-9607 13925182 SOI