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Student absences during learning cycle phases: a technologi..:

Marek, Edmund A ; Askey, David M ; Abraham, Michael R
International journal of science education.  22 (2000)  10 - p. 1055-1068 , 2000
Exemplar:  Zentrale:E03 z pae 638 j/734; Zentrale:Magazin Zs fe 1734