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Child Development|September 1, 1981
The effect of barriers on spatial representationsR Cohen, D L WeatherfordJournal of Experimental Child Psychology|February 1, 1983
Spatial representations of young children: the role of self- versus adult-directed movement and viewingC K Poag, R Cohen, D L WeatherfordAmerican Journal of Mental Deficiency|January 1, 1987
Mentally retarded and nonretarded adults' sensitivity to spatial structureJ J Rieser, D A Guth, D L WeatherfordPageof 1