Ritow, Ira <br/><br/>
Capsule calculus 
Ira Ritow 
 - New York  Dover Publications  2003 
 - xiii+177p.  appendix;index 
<br/><br/><label>ISBN: </label>9780486432564 
<br/><br/><label>Universal Decimal Class. No.: </label>517.2/.4  / RIT