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The vascular flora of Northampton County, Pennsylvania.

APA Citation

Schaeffer, R. L 1917- . (1949). The vascular flora of Northampton County, Pennsylvania. Philadelphia: s.n.

MLA Citation

Schaeffer, Robert L 1917-. The Vascular Flora of Northampton County, Pennsylvania. Philadelphia: s.n, 1949.

Warning: These citations may not always be complete (especially for serials).