TY  - BOOK
AU  -  Hartley,James
TI  -  Designing instructional text / 
SN  -  0850389437
U1  -  070.52 
PY  - 1985///
CY  -  London : 
PB  -  Kegan Page, 
KW  -  Text-books
KW  -  Authorship
KW  -  Teaching
KW  -  Aids and devices
ER  -