1. 2) VAARTAJA, O. and W.H. CRAM : Phytopathology, 46, 391-397(1956).
2. 3) VAARTAJA, O., W.H. CRAM, and G.A. MORGAN : ibid. 51,35-42(1961).
3. 8) MATHEWS. V. D. : Studies on the Genus Pythium, (The Univ. of N. Carolina Press) pp.1-3 (1931).
4. 9) LILLY, V.G. and H.L. BARNETT : Physiology of the Fungi, (McGraw-Hill Book Co.) pp.326-327 (1951).
5. 10) GOODING, G. V. and G. B. LUCUS : Phyto-pathology, 49, 277-281 (1959).