Statistical yearbook of Norway 

 - OSLO  Central Bureau of statistics         1973 
 - 32+445p.(92nd issue)  cm. 
<br/><br/> ISBN:82-537-0293-0 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>n573, N73, L3