1.
Rev. cuba. hig. epidemiol
; 13(1-2): 70, ene.-ago. 1975.
Article
in Spanish
| CUMED
| ID: cum-7440
2.
Rev. cuba. hig. epidemiol
; 13(1-2): 68-9, ene.-ago. 1975.
Article
in Spanish
| CUMED
| ID: cum-7439