Thirumalaikolundusubramanian, PAnuradha, AVijayaragavan, RLogambal, A1983-04-012009-05-271983-04-012009-05-271983-04-01Thirumalaikolundusubramanian P, Anuradha A, Vijayaragavan R, Logambal A. Periodicity of human birth at Madurai. Indian Pediatrics. 1983 Apr; 20(4): 310-1http://imsear.searo.who.int/handle/123456789/12012engBirth RateFemaleHumansIndiaInfant, NewbornMalePeriodicityPeriodicity of human birth at Madurai.Letter