992 resultados para Illinois. Dept. of Conservation.
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Title from cover.
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"Examines an area in extreme northwestern Illinois formed by the Galena, Apple, and Plum River systems ... designated a state Resource Rich Area."--P. iii.
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Mode of access: Internet.
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Title from cover.
Downers Grove groundwater investigation : Downers Grove, Illinois : results of round 2 well testing.
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"31856"--Colophon.
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"All tours effective until May 31, 2001, unless otherwise noted."--P. [4] of cover.
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Mode of access: Internet.
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"7/09"--Colophon.
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Cover title.
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"April 1, 1986."
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Cover title.
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Mandated by PA 81-178.
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Project no. 80.264.
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Project no.: 80.235.
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Looseleaf for updating.