TY  - BOOK
AU  - Duffy, Thomas M., Waller, Robert
TI  - Designing usable texts
SN  - 0122232607
U1  - 371.33 
PY  - 1985///
CY  - New York
PB  - Academic Press
KW  - Education
KW  - Methods of instruction
KW  - Methods of teaching
ER  -