Popilation reference bureau    Annual report nineteen sixty -one 1961.    

 - Washington  Population reference bureau 1961-62 1964-1966 1968       1968 
 - 1961-62(16p)  1962-63(20p)  1964-65(22p)  1968-69(33p)  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Y:5.73.N62<--N61,67<--N64,N68r, K8