How it works :  science and technology. 

 - 3rd ed. 
 - New York :  Marshall Cavendish,  c2003. 
 - 20 v. :  col. ill. ;  31 cm. 
<br/><br/> Includes indexes. 
<br/><br/><label>ISBN: </label>0761473149 (set) 0761473157 (v. 1) 0761473165 (v. 2) 0761473173 (v. 3) 0761473181 (v. 4) 076147319X (v. 5) 0761473203 (v. 6) 0761473211 (v. 7) 076147322X (v. 8) 0761473238 (v. 9) 0761473246 (v. 10) 0761473254 (v. 11) 0761473262 (v. 12) 0761473270 (v. 13) 0761473289 (v. 14) 0761473297 (v. 15) 0761473300 (v. 16) 0761473319 (v. 17) 0761473327 (v. 18) 0761473335 (v. 19) 0761473467 (v. 20) 
<br/><br/><label>LCCN: </label>2001028771 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology--Encyclopedias, Juvenile.<br/>Science--Encyclopedias, Juvenile.<br/>Technology--Encyclopedias.<br/>Science--Encyclopedias.
<br/><br/><label>LC Class. No.: </label>T9  / .H738 2003 
<br/><br/><label>Dewey Class. No.: </label>603