Byrd, Eldon A., 1939-. <br/><br/>
How things work :  practical guide for teaching scientific and technical principles / 
Eldon A. Byrd. 
 - West Nyack, N.Y. :  Parker Publishing Company,  1973. 
 - 231 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0134356446 
<br/><br/><label>LCCN: </label>73-004215 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching.<br/>Technology--Study and teaching.<br/>Science--Methodology.