TY - JOUR T1 - Validation of sources of pertussis immunisation data. JF - Journal of Epidemiology and Community Health JO - J Epidemiol Community Health SP - 309 LP - 311 DO - 10.1136/jech.34.4.309 VL - 34 IS - 4 AU - W O Williams AU - R Dajda Y1 - 1980/12/01 UR - http://jech.bmj.com/content/34/4/309.abstract N2 - In this paper we describe the validation of three sources of immunisation data in a study of whooping cough in West Glamorgan. The least reliable source was that of the general practitioners and the best was that of the parents, but the area health authority source should be used in future studies provided that sufficient time is allowed for the relevant information to reach the computer. ER -