Biggs, E. <br/><br/>
Teaching mathematics 5 to 9:  a classroom guide/ 
Edith, Biggs. and Joan Sutton. 
 - London,  Mc Graw-hill  1983 
 - viii,261p.:  ill.;  23 cm 
<br/><br/><label>ISBN: </label>0070841381 
<br/><br/><label>LC Class. No.: </label>DUCE QA135.5.B485