Destrezas básicas de matemáticas 
Francisco Leal...[et.a] 
 - 5. ed. 
 - San Juan , P.R.  McGraw-Hill Interamericana, S.A.  c1992. 
 - 250 p.  ill. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>LC Class. No.: </label>QA39.2