TY  - BOOK
AU  - Walls, H Bradley
AU  - Walls, H Bradley
TI  - Data collection systems : national dual record and related systems
U1  - DEM-F 001.4222 W 18942 
PB  - International Program of Laboratories for Population Statistics
KW  - REGISTRO DE DATOS
KW  - ESTADISTICAS VITALES
KW  - MEDICION
KW  - DEM
N1  - Incluye bibliografía
ER  -