TY  - BOOK
AU  - Dijkstra, Sanne
TI  - Research on instruction : design and effects
SN  - 0877782210
AV  - LB1028.35.R47 1990 
PB  - Educational Technology Publications
KW  - Instructional systems - Design
KW  - Educational technology
KW  - LB
N1  - Includes bibliographical references and index
ER  -