TY  - GEN
AU  - Botturi, Luca
AU  - Stubbs, S. Todd
TI  - Handbook of visual languages for instructional design theories and practices
SN  - 9781599047294
U1  - 371.33 
PY  - 2008///
CY  - New York
PB  - Information science
KW  - TEACHING AIDS EQUIPMENT MATERIALS
ER  -