Alʹtshuller, G. S. <br/><br/>
40 principles :  TRIZ keys to technical innovation / 
by Genrich Altshuller ; with new material by Lev Shulyak ; drawings by Uri Fedoseev ; translated and edited by Lev Shulyak and Steven Rodman. 
 - Worcester, [Mass.] :  Technical Innovation Center,  1997. 
 - 135 p. :  ill., ports. ;  28 cm. 
 - TrizTools ;  v. 1 .
<br/><br/><br/>Translated from the Russian. 
<br/><br/><label>ISBN: </label>0964074036 (pbk.) 
<br/><br/><label>LCCN: </label>97080921