Dobe, W. B. <br/><br/>
Techniques of calculation / 
W.B. Dobe. 
 - [1st ed.]. 
 - Brisbane :  William Brooks,  [1977]. 
 - 240 p. 
 - Social maths ;  Unit 1 .
<br/><br/><label>ISBN: </label>0855683856 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc.