"Statistical year book 1956, 75th issue" 

 - OSLo  Statistik sentralbyra        1956 
 - 394p  cm. 
<br/><br/><label>Standard No.: </label>158868 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"E.573s.N56, J6"