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Conserving the polar regions /
by James, Barbara,
Publication:
Austin, Tex. : Steck-Vaughn, 1991
. 48 p. :
, Originally published: East Sussex, England : Wayland, 1990.
28 cm.
Date:1991
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(1),
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Restoring our earth /
by Pringle, Laurence P.
Publication:
Hillside, N.J. : Enslow Publishers, 1987
. 64 p. :
, Includes index.
25 cm.
Date:1987
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(1),
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