Davis, B. Spatial reasoning in the early years: Principles, assertions, and speculations (1a ed.).
Dyfyniad Arddull ChicagoDavis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
Dyfyniad MLADavis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.