1.
Rev. Col. Méd. Cir. Guatem
;
8(3/4): 16, jul.-dic. 1998.
Article
in Spanish
| LILACS
| ID: lil-262860
2.
Rev. Col. Méd. Cir. Guatem
;
8(3/4): 17, jul.-dic. 1998.
Article
in Spanish
| LILACS
| ID: lil-262861