How it works :  the illustrated encyclopedia of science and technology / 
Edited by Ralph Hancock...[et al.]. 
 - New york :  Marshall Cavendish,  c 1978. 
 - Vols. :  ill. ;  28 cm. 
<br/><br/>V. 18- Telescope-Typewriter ; 
<br/><br/>66  66 
<br/><br/><label>ISBN: </label>0 85685 522 7 0 85685 228 7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dictionaries & encyclopedias.<br/>Science and technology.
<br/><br/><label>Dewey Class. No.: </label>503 / I6