Biochemical Aspects of Plant and Animal Coevolution. Ed. by J. B. Harborne.
Structure and Functioning of Plant Populations. Ed. by A. H. J. Freysen and J. W. Woldendorp.
The Control of Growth and Differentiation in Plants. By P. F. Wakeing and I. D. J. Phillips.
British Mosses and Liverworts. By E. V. Watson.
Flore de France, Fasc. 3. By M. Guinochff and R. de Vilmorin.