TY  - BOOK
AU  - United Nation, Department of Economic and Social Affairs.
ED  - United Nation, Department of Economic and Social Affairs.
TI  - Sample Surveys of Current Interest:  Twelth Report   
U1  - V1N45,93:3.N73s, L3 
PY  - 1973///
CY  - New York
PB  - United Nations        
N1  - Statistical Paper no.13
ER  -