Verbatim text: Gunn, C. R. and M. J. Seldin. 1976. Seeds and Fruits of North American Papaveraceae. Washington. [U.S.D.A. Agric. Res. Serv., Techn. Bull. 1517.]
Author: Gunn, C.R., Seldin, M.J.
Year: 1976
Title: Seeds and Fruits of North American Papaveraceae
Source: [[Source::[U.S.D.A. Agric. Res. Serv., Techn. Bull. 1517.]]]