TY  - BOOK
AU  - Akker, J. J. H. van den.
TI  - Educational design research
SN  - 9780415396349
AV  - LB1028.38  .E38 2006
PY  - 2006///
CY  - London
PB  - Routledge
KW  - Instructional systems
KW  - Design
KW  - Research
ER  -