Staff behaviour in pre-school centres.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001519:Behavior; D002657:Child Development; D004522:Educational Status; D006040:Goals; D006801:Humans; D007361:Intelligence Tests; D007802:Language; D008131:London; D008875:Middle Aged; D010988:Play and Playthings; D012578:Schools, Nursery; D012923:Social Class; D013663:Teaching; D013997:Time Factors; D014705:Verbal Behavior