TY  - BOOK
AU  - Keller,Arnold
ED  - Harper & Row Publishers
TI  - When machines teach: designing computer courseware 
SN  - 0060435917
U1  - 371.3944 23
PY  - 1987///.
CY  - New York: 
PB  - Harper & Row, 
KW  - Computer-assisted instruction
KW  - Authorship
KW  - Instructional systems
KW  - Design
N1  - Includes bibliographical references and index
ER  -