Wiss. Zeits: Nos. 1-2,4-6 

 - Halle  Maritn-luther-univ.  1966 
<br/><br/><label>Subjects--Topical Terms: </label><br/>555:N52
<br/><br/><label>Dewey Class. No.: </label>555:N52  / 113I2.15