RUHSAM, M. 2005. “Coryphantha. R.F. Dicht & A.D. Lüthy. Berlin, Heidelberg: Springer-Verlag. 2005. 200pp, Colour Plates, Drawings, Maps. ISBN 3 540 22306 1. £61.50 (hardback)”. Edinburgh Journal of Botany 61 (2-3): 201-2. https://doi.org/10.1017/S0960428605290273.