TY  - BOOK
AU  - Hudson,Keith .
TI  - Introducing CAL : a practical guide to writing computer-assisted learning programs / 
SN  - 0412262401
U1  - 371.39445 
PY  - 1984///
CY  - New York : 
PB  - Chapman and Hall , 
KW  - COMPUTER-ASSISTED INSTRUCTION
N1  - Includes references and index
ER  -