Walker, Gordon <br/><br/>
Astronomical observations 
Gordon Walker                                               
 - Cambridge  Cambridge University Press  1987 
 - xii, 347p. 
<br/><br/><label>ISBN: </label>0-521-33907-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical techniques<br/>Astronomy and astrophysics thesaurus<br/>Optical observations
<br/><br/><label>Universal Decimal Class. No.: </label>520.8  / WAL