Purcell, John Francis,  1916- <br/><br/>
From hand ax to laser  man's growing mastery of energy illustrated by Judy Skorpil 
by John Purcell 
 - New York  Vanguard Press  c1982 
 - xi, 308 p.  ill.  24 cm. 
<br/><br/> Includes indexes 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Power (Mechanics)--History<br/>Science--History
<br/><br/><label>Dewey Class. No.: </label>621.042