Bothwell, 1963, Br. med. J., 2, 1613, 10.1136/bmj.2.5373.1613
Burns, 1967, Brit. med. J., 3, 773, 10.1136/bmj.3.5568.773
Chuttani, 1966, Brit. med. J., 2, 676, 10.1136/bmj.2.5515.676
Dismukes, 1969, Am. J. Epidemiol., 89, 555, 10.1093/oxfordjournals.aje.a120968
Eisenstein, 1963, J. Am. med. Ass., 185, 171, 10.1001/jama.1963.03060030029020
Hutchinson, 1956, Mon. Bull. Min. Hlth, 24, 376
Joseph, 1965, New Eng. J. Med., 273, 188, 10.1056/NEJM196507222730403
Krugman, 1959, New. Eng. J. Med., 261, 729, 10.1056/NEJM195910082611501
Krugman, 1960, J. Am. med. Ass., 174, 823, 10.1001/jama.1960.03030070001001
Lobel, 1965, Bull. Wld. Hlth Org., 32, 675
Mason, 1962, Am. J. Hyg., 95, 90
Mosley, 1959, New Eng. J. Med., 261, 703, 10.1056/NEJM195910012611407
Neefe, 1947, Am. J. publ. Hlth, 37, 365, 10.2105/AJPH.37.4.365
Poskanzer, 1961, Pub. Hlth Rep. Wash., 76, 745, 10.2307/4591269
Public Health Laboratory Service, 1968, Brit. med. J., 3, 451, 10.1136/bmj.3.5616.451
Ringertz, 1971, Postgrad. med. J., 47, 465, 10.1136/pgmj.47.549.465
Robertson, 1967, Med. Offr, 117, 197