The Ultimate How It Works Encyclopedia. 

 - Fairfield, IA :  Books are Fun Ltd,  c2002. 
 - 366 p.: p., col. ill.;, 31 cm. 
<br/><br/> Includes The World of Animal Life, The Environment, The Human Body, Exploring the Oceans, The World of Plant Life, Dicovering prehistory, Discovering the Universe and the World of Insect Life. 
<br/><br/><label>ISBN: </label>1-58209-396-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Paleontology<br/>Plants<br/>Oceans<br/>Human Body<br/>Ecology