Repertorium plantarum succulentarum, XX-1969
Rowley, G.D., Newton, L.E.
Repertorium plantarum succulentarum, XX-1969 - Utrecht 1971 - 1-36 p. - Netherlands International Bur .
Repertorium plantarum succulentarum, XX-1969 - Utrecht 1971 - 1-36 p. - Netherlands International Bur .