˜Derœ Betrieb  Jg. 76. 2023, H. 1 - 51/52 

<br/><br/><label>ISSN: </label>0005-9935 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>1278378421  DE-101 
<br/><br/><label>Dewey Class. No.: </label>340  650