Verbatim text: Wolf, C. B. 1938. The North American species of Rhamnus. Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser. 1.
Author: Wolf, C.B.
Year: 1938
Title: The North American species of Rhamnus
Journal: Rancho Santa Ana Bot. Gard. Monogr., Bot. Ser
Volume: 1