Santos, David, and Davis, Olgha B. <br/><br/>
Algebra essentials/ 

 - New Delhi  Mercury Learning and Information  2016 
 - 180p.  .ill 
<br/><br/><label>ISBN: </label>978-1-9375-85-22-8-8 
<br/><br/><label>Dewey Class. No.: </label>512.13 Sa237