Herrman ,U.O <br/><br/>
Practical astronomy :  

 - Kendall :   London ;  1979. 
 - 24 cm .  01 
 - 2024-10-25 
<br/><br/><label>ISBN: </label>0840321090 
<br/><br/><label>Nat. Bib. No.: </label>0001585 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>HER 
<br/><br/><label>Universal Decimal Class. No.: </label>920