Wright, R. T. <br/><br/>
Understanding technology/ 
R. Thomas Wright and Howard Bud Smith 
 - South Holland:  The goodheart-Willcox,  1993. 
 - 312p.:  ill.;  26 cm. 
<br/><br/> Include index 
<br/><br/><label>ISBN: </label>9780870069055 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>LC Class. No.: </label>DUCE T47.W75