Posin, Daniel Q. <br/><br/>
What is chemistry / 
Daniel Q. Posin ; Pictures by William Tanis. 
 - Chicago :  Benefic Press,  1961. 
 - 47 p. :  ill. ;  21 cm. 
 - The What is it series. .
<br/><br/>300  300 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry.
<br/><br/><label>Dewey Class. No.: </label>540 / P842w