1. The conditions of learning;Gagné,1970
2. Instructional psychology;Gagné;Annual Review of Psychology,1969
3. The factor of attention in underachievement;Gilmore;Journal of Education,1968
4. The emotionally disturbed child in the classroom: A developmental strategy for educating children with maladaptive behavior;Hewett,1968
5. Montessori with the culturally disadvantaged: A cognitive development interpretation and some research findings;Kohlberg,1968