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Limnological Studies of the Island Area of Western Lake Erie

Noah Wilson BrittJames T. AddisRonald Engel

出版	Ohio State University, 1973
主題	Nature / Ecosystems & Habitats / Lakes, Ponds & SwampsScience / Earth Sciences / Limnology
ISBN	08672706249780867270624
URL	http://books.google.com.hk/books?id=9TYJAAAAIAAJ&hl=&source=gbs_api

註釋

With his mother about to give birth and his father unconscious from a fall, it's up to eleven-year-old Perry to take charge.