(1974). Nuffield Foundation. Science Teaching Project. Revised Nuffield biology: Text 1 Introducing Living Things (Revised edition.). Longman.
Chicago-viite (17. p.)Nuffield Foundation. Science Teaching Project. Revised Nuffield Biology: Text 1 Introducing Living Things. Revised edition. London: Longman, 1974.
MLA-viite (9. p.)Nuffield Foundation. Science Teaching Project. Revised Nuffield Biology: Text 1 Introducing Living Things. Revised edition. Longman, 1974.
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