Walker, Gordon Arthur H,  1936- <br/><br/>
Astronomical observations :  an optical perspective / 
Gordon Walker. 
 - New York :  Cambridge University Press,  1987. 
 - xii, 347 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0521325870 
<br/><br/><label>LCCN: </label>866833  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical instruments.<br/>Astronomy--Techniques.<br/>Optical instruments.<br/>Astrophysics.