TY  - BOOK
AU  - Powell,Nara P.
TI  - Systems of demographic measurement data colloction systems : the conventional vital registration system / 
T2  - Laboratories for population statistics. scientific report series
U1  - 304.6 
PY  - 1975///
PB  - POPLAB, 
KW  - Sociology
KW  - Surveys
KW  - Demographic statistics
KW  - Demographic models
KW  - Registration
ER  -