Powerful approaches to learning and instruction : papers presented at the 7th European conference for research on learning and instruction, Athens, Greece, August 26-30, 1997 / [Th.C.M. Bergen ... et al.]
"Powerful approaches to learning and instruction : papers presented at the 7th European conference for research on learning and instruction, Athens, Greece, August 26-30, 1997 / [Th.C.M. Bergen ... et al.]"
"Powerful approaches to learning and instruction : papers presented at the 7th European conference for research on learning and instruction, Athens, Greece, August 26-30, 1997"