TY  - BOOK
TI  - Popilation reference bureau :  Annual report nineteen sixty -one 1961.   
U1  - Y:5.73.N62<--N61,67<--N64,N68r, K8 
PY  - 1968///
CY  - Washington
PB  - Population reference bureau 1961-62 1964-1966 1968     
ER  -