TY  - BOOK
AU  - Ingram,David
TI  - First language acquisition: method, description, and explanation 
SN  - 0521349168
PY  - 1989///
CY  - Cambridge [England], New York, N.Y.
PB  - Cambridge University Press
KW  - Language acquisition
N1  - Includes bibliographical references : (p. 519-548) and index; The history of child language studies--Stages of language acquisition--Explanation and language acquisition--The period of prelinguistic development
ER  -