The how it works encyclopedia of great inventors & discoveries. 

 - London :  Marshall Cavendish,  c1978. 
 - 114 p. : ill. (some col.). 
<br/><br/><label>ISBN: </label>0856854298 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventors--Encyclopedias.<br/>Explorers--Encyclopedias.