Proceedings of the 8th International Sunflower Conference, Minneapolis, Minnesota, U.S.A. July 23 thru July 27, 1978
sponsored by the Sunflower Association of America in cooperation with the International Sunflower Association.
[S.l : s.n.], [1978?]
592 págs. : ilustraciones, gráf., mapas.
Modo de acceso: World Wide Web.