TY  - JOUR 
T1  - Difficulties encountered in a community-based study of acute respiratory infections in Uruguay
JO  - Revista de Saúde Pública
A1  - Hortal, Maria
A1  - Meny, Miguel
SN  - 0034-8910
UL  - 10.1590/S0034-89101993000200008
VL  - 27 
Y1  - 1993
PB  - Brasil 
ER  -