Walker, Gordon Arthur Hunter,  1936- <br/><br/>
Astronomical observations :  An optical perspective / 
Gordon Walker. 
 - Cambridge [Cambridgeshire] ;  New York :  Cambridge University Press,  1987. 
 - xii, 347 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliogr.: p. [321]-341. 
<br/><br/><label>ISBN: </label>0521325870 0521339073 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical instruments.<br/>Astronomy--Technique.<br/>Optical instruments.<br/>Astrophysics.