Abstracts of presented papers 

 - Ohio  ERIC Information Analysis Center for Science Mathematics & Environmental Education  [19 -?] 
 - v.; 22cm. 
<br/><br/> annual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science-study and teaching-abstract
<br/><br/><label>Dewey Class. No.: </label>507.016  / ABS