A study of the smiling and laughing of infants in the first year of life
By: from the Yale psycho-clinic, by Ruth Wendell Washburn
Series: Genetic psychology monographs -- v. 6, no. 5&6
Publisher: Clark university
Published: 1929
Place of publication: Worcester, Mass
Language: eng
Number of pages: 537
Copyright date: 1929
Subjects: Laughter; Emotions; Infants; Child psychology
Other titles: The smiling and laughter of infants in the first year of life, A study of.
Notes: Volume number of series corrected in manuscript to vol. VI.

"This report is part of a dissertation presented for the degree of doctor of philosophy in Yale university."

"References": p. 532-535.