by A. V. Hall
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South African red data book
Studies of the South African species of ...
Systematics of Hessea, Strumaria and Car...
The use of a computer-based system of ai...
Systematics, biology and evolution of so...
The genera of the Mesembryanthemaceae
Infloreszenzstudien an Aizoaceen, Mesemb...
Morphologische, anatomische und entwickl...
Notes on Mesembrianthemum and some allie...
An annotated index to Salm-Dyck's "Monog...
Monographia generum aloes et mesembryant...