Certain language skills in children : their development and interrelationships.
- Minneapolis : University of Minnesota Press, 1957.
- University of Minnesota. Institute of Child Welfare. Monograph series ; no. 26 .
- University of Minnesota. Institute of Child Welfare. Monograph series ; University of Minnesota. Institute of Child Welfare. Monograph series ; University of Minnesota. Institute of Child Welfare. Monograph series ; no. 26. .