1. A. Castellani, J. of Tropical Medicine and Hygiene Dec. 15, 1937.
2. J. W. Hotson, Mycologia28, 497, 1936.
3. P. Klincksieck etTh. Valette, Code des Couleurs. Paris 1908.
4. E. Rennerfelt, Centralbl. f. Bakt. II,104, 71, 1941.
5. F. H. van Beyma thoe Kingma, Centralbl. f. Bakt. II,97, 386, 1939.