Johnson, Mildred D. <br/><br/>
Problem solving and chemical calculations / 
by Mildred D. Johnson 
 - Brace & World, New York :  Harcourt,  1969 
 - viii, 341 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry--Problems, exercises, etc