Lean, G. A.
Spatial ability, visual imagery, and mathematical performance / G. A. Lean and M. A. (Ken) Clements. - [Lae] : Mathematics Education Centre, P.N.G. University of Technology, 1980. - 91p. - Report ; no. 10. .
Visual perception.
Mathematical ability--Testing.
Space perception.
Spatial ability, visual imagery, and mathematical performance / G. A. Lean and M. A. (Ken) Clements. - [Lae] : Mathematics Education Centre, P.N.G. University of Technology, 1980. - 91p. - Report ; no. 10. .
Visual perception.
Mathematical ability--Testing.
Space perception.