Media type: E-Article Title: Philosophische Probleme der Arttheorie Contributor: Cook, C. D. K.; Sucker, Ulrich imprint: JSTOR, 1978 Published in: Systematic Botany Language: Not determined DOI: 10.2307/2418302 ISSN: 0363-6445 Keywords: Plant Science ; Genetics ; Ecology, Evolution, Behavior and Systematics Origination: Footnote: