title: Klaus Fischer (PSNA phytochemistry pioneer).
authors.affiliation: nfischer@grandecom.net
authors.forename: N H Klaus
authors.initials: NH
authors.lastname: Fischer
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D009656:North America; D010598:Pharmacognosy / Q000266:history*; D010944:Plants / Q000737:chemistry*; D012958:Societies, Scientific