Schools Council, Nuffield Foundation, Nuffield Foundation, & Scottish Education Department. (1973). Trees; stages 1 and 2: A unit for teachers. MacDonald Educational.
Chicago-viite (17. p.)Schools Council, Nuffield Foundation, Nuffield Foundation, ja Scottish Education Department. Trees; Stages 1 and 2: A Unit for Teachers. London: MacDonald Educational, 1973.
MLA-viite (9. p.)Schools Council, Nuffield Foundation, et al. Trees; Stages 1 and 2: A Unit for Teachers. MacDonald Educational, 1973.
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