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Bol. Oficina Sanit. Panam
;
113(1): 19-27, 1992. tab
Article
in Portuguese
| LILACS
| ID: lil-370415
2.
Bull. Pan Am. Health Organ
;
26(2): 157-164, 1992. tab
Article
in English
| LILACS
| ID: lil-371077