Simpson, O. J. <br/><br/>
Basic chemical calculations for first examinations / 
O.J. Simpson. 
 - 3rd ed. 
 - London :  Edward Arnold,  1975 
 - 85p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry--Examinations, questions, etc.<br/>Chemistry--Problems, exercises, etc.