1. Concern Over Internal, External, and Incidence Validity in Studies of Child‐Care Quantity and Externalizing Behavior Problems. (30th January 2017) Authors: Dearing, Eric; Zachrisson, Henrik D. Journal: Child development perspectives Issue: Volume 11:Number 2(2017) Page Start: 133 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗