Illustrated handbook of succulent plants

By Heidrun E. K. Hartmann, P. Chesselet, D.T. Cole, N.A. Cole, M. Gerbaulet, L.B. Groen, S.A: Hammer, H.-D. Ihlenfeldt, C. Klak, I.M. Niesler, S.M. Pierce, N. Zimmermann