STIDWORTHY, J. Encyclopedi of science: Plants and animals. Volume V. Macmillan Publishing Company.
Chicago-viite (17. p.)STIDWORTHY, John. Encyclopedi of Science: Plants and Animals. Volume V. Macmillan Publishing Company.
MLA-viite (8. p.)STIDWORTHY, John. Encyclopedi of Science: Plants and Animals. Volume V. Macmillan Publishing Company.
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