Small inventions that make a big difference / 
National Geographic Society 
 - Washington, D.C. :  National Geographic Society,  c1984. 
 - 104 p. :  ill. (some col.) ;  28 cm. 
 - Books for world explorers .
<br/><br/> Accompanied by "The patent game" (1 sheet [2] p. : col. ill. ; 75 x 49 cm. folded to 25 x 19 cm.).  Includes index. 
<br/><br/>Bibliography: p. 101. 
<br/><br/> Describes how inventors think and work, explains how one invention--plastic--has changed the world, and briefly discusses seventy-five other important inventions, from the jet engine to the potato chip. 
<br/><br/><label>ISBN: </label>0870444980  0870445030 (lib. bdg.) :  $8.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions--Juvenile literature.<br/>اختراعات<br/>Inventions.<br/>Inventors.<br/>Plastics.
<br/><br/><label>Dewey Class. No.: </label>608  / N S