Kitabu cha saba cha hesabu, Tanzania 

 - Dar es Salaam   : Mathematic Unit,   1970 
 - 167p.   : ill.   ; 24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Guides<br/>Studying and teaching
<br/><br/><label>LC Class. No.: </label>EAF QA11.T33 No.7