TY  - BOOK
ED  - Bates, Madeleine
ED  - Weischedel, Ralph M.
TI  - Challenges in natural language processing
SN  - 0521410150
U1  - 410.285 
PY  - 1993///
CY  - Newyork
PB  - Cambridge University press
UR  - www.cambridge.org
ER  -