TY  - BOOK
AU  - Ledford,Bruce R.
AU  - Sleeman,Phillip J.
TI  - Instructional design: system strategies 
SN  - 1931576823
AV  - LB1028.38  .L42 2002
PY  - 2002///
CY  - Greenwich, CT
PB  - Information Age Publishing
KW  - Instructional systems
KW  - United States
KW  - Design
KW  - Educational technology
ER  -