Eravelly, Freddy. <br/><br/>
Modul 4 :  mengajar operasi-operasi asas / 
oleh Freddy Eravelly. 
 - Kuala Lumpur :  Maktab Perguruan Ilmu Khas,  1987. 
 - 48 p. ;  29 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching--Malaysia.<br/>Mathematics--Study and teaching (Primary)--Malaysia.