Keyod Grace B.  <br/><br/>
The earth's twin problem:   global warming and water acidification/ 
Grace B. Keyod.  
 - Philippines:   In the Grade School, Inc.,   ©2012. 
 - V61 n1, pages 22-23;  28 cm.  
<br/><br/> The Modern Teacher 
<br/><br/><label>ISSN: </label>2094-8042  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Greenhouse effect
<br/><br/><label>Dewey Class. No.: </label>DPer 370.105 M72 Jan-Dec 2012 V. 60-61