Seeds and fruits of North American papaveraceae
Gunn, C.R., Seldin, M.J.
Seeds and fruits of North American papaveraceae - Washington 1976 - 1-96 p. - Seeds, Fruits United States Department of Agriculture.Technical Bulletin No. 1517 .
Seeds and fruits of North American papaveraceae - Washington 1976 - 1-96 p. - Seeds, Fruits United States Department of Agriculture.Technical Bulletin No. 1517 .