"Originally published by Little, Brown and Company"--T.p. verso.
Contents:
The sunlight zone -- The twilight zone -- The dark zone -- The Hadal zone -- Diving. Past and present: 1250 -- 1715 -- 1830 -- 1892 -- 1930 -- 1942 -- 1960 -- 1989 -- The present -- The deep, dark sea.
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