The great international "Math on keys" book / 
Ed. by R.A. Oliva, M.D. LaMont. 
 - S. l. :  S.A,  1976. 
 - 1-33, 2-8,3-22, 4-25, 5-14, 6-26, 7-14, 8-21, 9-16 :  ill. ;  21 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0-89512-002-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Management<br/>Finance<br/>Mathematics