Repertorium plantarum succulentarum, XIX-1968
Rowley, G.D., ed.
Repertorium plantarum succulentarum, XIX-1968 - Utrecht 1970 - 0.5 - Vol 67; Netherlands Internati .
Repertorium plantarum succulentarum, XIX-1968 - Utrecht 1970 - 0.5 - Vol 67; Netherlands Internati .