Forest Trees and Timbers of the British Empire. Part I. Some East African Coniferae and Leguminosae.by L. Chalk; J. Burtt Davy; H. E. Desch;Forest Trees and Timbers of the British Empire. Part II. Twenty West African Timber Trees.by L. Chalk; J. Burtt Davy; H. E. Desch; A. C. Houle;Forest Trees and Timbers of the British Empire. Part III. Fifteen South African High Forest Timber Treesby L. Chalk; M. M. Chattaway; J. Burtt Davy; F. S. Laughton; M. M. Scott