TY  - BOOK
TI  - Monographs on infancy
SN  - 0405064721
PY  - 1975///
CY  - New York
PB  - Arno Press
KW  - Infant psychology
KW  - Laughter
KW  - Motor ability in children
KW  - Hand
N1  - Reprint of A study of the smiling and laughing of infants in the first year of life, by R. W. Washburn, originally published in Genetic psychology monographs, v. 6, 1929, and of An experimental study of prehension in infants by means of systematic cinema records, by H. M. Halverson, originally published in Genetic psychology monographs, v. 10, 1931; Includes bibliographies
ER  -