Lewis, J. Parry. <br/><br/>
An introduction to mathematics :  for students in economics / 
J. Parry Lewis. 
 - 2nd ed. 
 - London :  Macmillan,  c1959. 
 - xiii, 590 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Economic.