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2. Conel, J. LeRoy, 1941, The Postnatal Development of the Human Cerebral Cortex, Vol. II, The Cortex of the One-Month Infant, Harvard University Press, Cambridge, Massachusetts.
3. Conel, J. LeRoy, 1947, The Postnatal Development of the Human Cerebral Cortex, Vol. III, The Cortex of the Three-Month Infant, Harvard University Press, Cambridge, Massachusetts.
4. Conel, J. LeRoy, 1951, The Postnatal Development of the Human Cerebral Cortex, Vol. IV, The Cortex of the Six-Month Infant, Harvard University Press, Cambridge, Massachusetts.
5. Conel, J. LeRoy, 1955, The Postnatal Development of the Human Cerebral Cortex, Vol. V, The Cortex of the Fifteen-Month Infant, Harvard University Press, Cambridge, Massachusetts.