Biosystematic Monograph of the Genus Cucumis (Cucurbitaceae : Botanical Identification of Cucumbers and Melons/Book and Disk)
Biosystematic Monograph of the Genus Cucumis (Cucurbitaceae : Botanical Identification of Cucumbers and Melons/Book and Disk) by Joseph H., Jr. Kirkbride

A Biosystematic Study of North American Thlaspi Montanum and Its Allies/Novitates Antillanae IV
A Biosystematic Study of North American Thlaspi Montanum and Its Allies/Novitates Antillanae IV by P. K. Holmgren & Alain H. Liogier

Studies in Begoniaceae IV
Studies in Begoniaceae IV: Biosystematics of Begonia Squamulosa Hook. F. and Affiliated Species in Section Tetraphila A.D.C. (Wageningen Agricultura) by J.C. Arends

A biosystematic study of the genus Brodiaea (Amaryllidaceae)
A biosystematic study of the genus Brodiaea (Amaryllidaceae) (University of California publications in botany, v. 60) by T.F. Niehaus