Ronald G. Barr
Books
Crying as a sign, a symptom, & a signal
2000
ISBN 9781898683216
New evidence on unexplained early infant crying
2001
ISBN 9780931562211
The Cambridge encyclopedia of child development
2005
ISBN 9780521651172
Child Development. the Cambridge Encyclopedia Of
2005
ISBN 9781280432514
Our Babies, Ourselves: The Crying Game