Ronald G. Barr

Challenges to developmental paradigms

Year unknown Philip R. Zelazo and Ronald G. Barr

Child Development. the Cambridge ...

Child Development. the Cambridge Encyclopedia Of

Year unknown Ronald G. Barr, Philippe Rochat, George F. Michel, and Brian Hopkins

Crying as a sign, a symptom, & a signal

Year unknown Ronald G. Barr, B. Hopkins, and James A. Green

New evidence on unexplained early infant crying

Year unknown Ronald G. Barr, Ian St. James-Roberts, and Maureen Ruth Keefe

The Cambridge encyclopedia of child development

Year unknown Ronald G. Barr, George F. Michel, and Philippe Rochat

The Cambridge Encyclopedia of child development

Year unknown B. Hopkins and Ronald G. Barr