TY  - BOOK
AU  - Postman, Neil
AU  - Damon, Howard C.
TI  - Language and systems
U1  - GC 420 P846 1967 
PY  - 1967///
CY  - New York
PB  - holt, Rinehart and Winston
KW  - English language
N1  - Includes index
ER  -