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High school students' concepts regarding food chains and fo..:

Barmann, Charles R ; Griffiths, Alan K ; Okebukola, Peter A.O
International journal of science education.  17 (1995)  6 - p. 775-782 , 1995
Exemplar:  Zentrale:E03 z pae 638 j/734; Zentrale:Magazin Zs fe 1734