General Certificate of Secondary Education & Suffolk County Council. (1987). Co-ordinated science lesson notes: Biology. Collins Educational.
Chicago-viite (17. p.)General Certificate of Secondary Education ja Suffolk County Council. Co-ordinated Science Lesson Notes: Biology. London: Collins Educational, 1987.
MLA-viite (9. p.)General Certificate of Secondary Education ja Suffolk County Council. Co-ordinated Science Lesson Notes: Biology. Collins Educational, 1987.
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