Under copyright (with permission).
Many thanks to Associated Univeristy Press and D.T. Cole for the authorization to distribute this e-book.
Published in 1970, this book proposes an impressive series of 312 color pictures of lithops. The variability of every species is well illustrated by several distinctive pictures. It is a pity that some pictures exhibit a dominant green-blue shade.
* Image file: Sprechman_O.pdf (48.3MB; 2008-3-16)
* Interpreted file: Sprechman.pdf (27.6MB; 2008-3-16)

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