TY  - BOOK
ED  - National Center for Health Statistics.
TI  - Selected symptoms of psychological distress
T2  - Serie: Vital and Health Statistics
U1  - VHS 1970
PY  - 1970///
CY  - Rockville, MDo. USA
PB  - NCHS
KW  - Psicofisiología-Entrevistas
KW  - Población
ER  -