136.76PevOPevzner,MariaSemenovnaOligophreniamentaldeficiencyinchildren.Withapref.byJ.Tizard.TrfromtheRussian.NewYork,ConsultantsBureau(c1961)xiii,406p.ilus,lams24cm(Theinternationalbehavioralsciencesseries)”Bibliographi”:p.339-406