1.
Rev. méd. Hosp. Gen. Méx
;
45(5/6): 164-7, 1982.
Article
in Spanish
| LILACS
| ID: lil-13555
2.
Salud pública Méx
;
24(3): 341-346, 1982.
Article
in Spanish
| LILACS
| ID: lil-9991