BarberM. (1947). Coagulase-positive staphylococci resistant to penicillin. J. Path. Bact., 59, 373.
2.
FairbrotherR. W.MartynG. (1951). The disc technique for determining sensitivity to the antibiotics. J. clin. Path., 4, 374.
3.
GreenbergL.FitzpatrickK. M.BranchA. (1957). The status of the antibiotic disc in Canada. Canad. med. Ass. J., 76, 194.
4.
IngramG. I. C. (1951). Formation of clear zones with ‘sensitive’ and ‘resistant’ Staphylococcus aureus in penicillin plate assays. J. Gen. Microbiol., 5, 22.
5.
LeesK. A.TootillJ. P. R. (1955). Microbiological assay on large plates. The Analyst, 80, 531.
6.
SpinkW. W.FerrisV.VivinoJ. J. (1944). Comparative in vitro resistance of staphylococci to penicillin and to sodium sulphathiazole. Proc. Soc. exp. Biol., N.Y., 55, 207.
7.
StokesE. J. (1955). Clinical Bacteriology, pp. 154–156. London. Edward Arnold (Publishers), Ltd.
