TOPS :  Tested overhead projection series / 
Compiled by Hubert N. Alyea. 
 - 3rd ed. 
 - Easton, Pennsylvania :  Division of Chemical Education of the American Chemical Society,  1967. 
 - ix, 128 p. :  ill. ;  28 cm. 
<br/><br/> Cover title: TOPS in general chemistry: Tested overhead projection series.  'Reprinted from Journal of chemical education.' 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry--Experiments.