1.
Bol. epidemiol. Antioq
;
7(3): 48-59, jul.-sept. 1982. tab
Article
in Spanish
| LILACS
| ID: lil-71728
2.
Indian Pediatr
;
1974 Nov; 11(11): 763-4
Article
in English
| IMSEAR
| ID: sea-15173