Racial and sexual differences in age of walking: a reanalysis of the Smith et al. (1930) data.
D044466:Asian People; D002657:Child Development; D005260:Female; D006801:Humans; D007223:Infant; D008124:Locomotion; D008297:Male; D044469:Racial Groups; D012737:Sex Factors; D013223:Statistics as Topic; D044465:White People