Gates, Reginald Ruggles. Taxonomy and genetics of oenothera; forty years study in the cytology and evolution of the onograceae - Uitgevery, Netherlands : Junk, 1958 - 115 p. : ilus. - Monographiae biologicae ; 7 . - Monographiae biologicae ; 7 . LCCN: 74339 Subjects--Topical Terms: Genética vegetal.Oenothera.Onagraceae. Dewey Class. No.: 583.44 / G38