How and why it works :  how everyday things work in the home, office, industry and transport. 

 - London :  Odhams Press,  1948. 
 - 318 p.  ill.;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology.
<br/><br/><label>Dewey Class. No.: </label>600  / HOW 1948