TY  - BOOK
AU  - Rockwell, John E.
TI  - A comparison of the manipulation of concrete objects and the use of pictures in children's language production: variations of a Piagetion theme 
PY  - 1980///
CY  - Ann Arbor, Mich.
PB  - University Microfilms International
KW  - Piaget, Jean,
KW  - Child development
KW  - Children
KW  - Language
KW  - Communication
KW  - Language and education
N1  - Thesis (Doctor of Education)-Temple University, 1979
ER  -