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The Canadian junior green guide /
by Degler, Teri,
Publication:
Toronto : McClelland & Stewart, 1990
. 120 p. :
26 cm.
Date:1990
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Pollution and conservation /
by Penny, Malcolm.
Publication:
Englewood Cliffs, N.J. : Silver Burdett Press, 1989
. p. cm.
, Includes index.
Date:1989
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Pollution: the land we live on
by Jones, Claire.
Publication:
Minneapolis, Lerner Publications Co. 1971
. 102 p.
23 cm.
Date:1971
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