Lean, G. A. <br/><br/>
The training of spatial abilities  a bibliography 
G.A. Lean. 
 - Lae  Mathematics Education Centre, Papua New Guinea University of Technology  1980. 
 - 17 p.  30 cm. 
 - Report  no. 8. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Space perception in children--Bibliography.