Catalogue of North American plants north of Mexico exclusive of the lower cryptogams Heller, Amos Arthur, 1867-1944 creator text book [S.l s.n.] 1900 1900 2nd ed.
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ENG Canada Catalogs Plants United States FC 02 0203 no. 13517 AEU 581.97 CIHM/ICMH microfiche series, no. 13517 https://www.biodiversitylibrary.org/bibliography/38330 0665135173 10.5962/bhl.title.38330 CaOOCIHM