Mundus : Qua. Review Of German Research Vol.17.1981 

 - Stuttgart  Wissen. Verlag  1981 
 - Nos.1-4 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>504:55:N6
<br/><br/><label>Dewey Class. No.: </label>504:55:N6  / J5.17