1. The correlational law of effect;Baum;Journal of the Experimental Analysis of Behavior,1973
2. Child development I: A systematic and empirical theory;Bijou,1961
3. Influences of contingent and auditory stimulation upon nonnutritional sucking;Butterfield,1972
4. Assessing infant's auditory functioning;Cairns,1975
5. Infant visual memory;Cohen,1975