Verbatim text: Ewan, J. 1945. A synopsis of the North American species of Delphinium. Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 55-244.
Author: Ewan, J.
Year: 1945
Title: A synopsis of the North American species of Delphinium
Journal: Univ. Colorado Stud., Ser. D, Phys. Sci
Volume: 2
Pages: 55–244