Manual para el curso de ciencia general. 

 - Ponce, P.R.  [s.n.]  1977. 
 - v.  ill. 
<br/><br/><label>LCCN: </label>fel36001854  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico