t20454
eChemBook: ein
interaktives,
digitales
Schulbuch für
den
Chemieunterricht
b05156
Handbook of
Research on
Educational
Communications
and Technology
t20454->b05156
b02601
E-Learning and
the Science of
Instruction
(2002)
t20454->b02601
b03666
The Cambridge
handbook of
multimedia
learning (2005)
t20454->b03666