1. Wilkins, W. H., and Harris, G. C. M., Brit. J. Exp. Path., 25, 135 (1944).
2. Thorn, C., âœThe Penicilliaâ (London: BailliÃre, Tindall and Cox,).
3. Westerdijk Johanna, âœLijst van Schimmelculturesâ (Baarn, 1943).
4. Hetherington, A. C., and Raistrick, H., Phil. Trans. Roy. Soc. Lond., B, 220, 269 (1931).
5. Raistrick, H., and Smith, G., Chem. and Ind., 60, 828 (1941).