Authors: C J Strachan; J Black; S J Powis; T A Waterworth; R Wise; A R Wilkinson; D W Burdon; M Severn; B Mitra; H Norcott Journal: Br Med J Date: 1977-05-14
Authors: S J Karran; M de la Hunt; I Townend; G Tasker; B Walmsley; P McDonald; C Royce; H Goh; R Dawes; J Smallwood Journal: Antibiot Chemother (1971) Date: 1985