The World of Haworthias. Vol.1: Bibliography and Annotated Index. 1998. 223 (48 kol.) figures. 340 p. Hardcover.

From the preface: This volume is not a casual read on the subject ofHaworthia or a monograph of the genus but a 'working' book with agreat deal of data and brief explanations which should allow thereader to obtain desired information about the genus for himself... Mystudies relate to 968 references. The results of this work producedabout 10000 literature references for the genus Haworthia...My intensivework with available literature, specimen plants and discussions withother Haworthia experts has given me insight into how the taxa couldbe classified and defined. In this book my preliminary conclusionsare described as a working hypothesis. The taxa which in my opinionare different from those held by Bayer are cited at the beginning of chapter 4.-.. Index: Literature(p.1)/ Authors of names (p.53)/ Updatedclassifiction (p.69)/ Annotated index of all names (p.79)/ Check - listof all accepted taxa and their synonyms (p.285)/ Index (Plant names,black & white illustrations, colour figures, reference numbers).