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1.

Potential for Agricultural Chemical Contamination of Aquifers in Illinois : 1995 Revision (C...

Potential for Agricultural Chemical Contamination of Aquifers in Illinois : 1995 Revision (C... by Keefer, Donald Allen ISBN: 9780331422382 List Price: $24.91

2.

Potential for Agricultural Chemical Contamination of Aquifers in Illinois : 1995 Revision (C...

Potential for Agricultural Chemical Contamination of Aquifers in Illinois : 1995 Revision (C... by Keefer, Donald Allen ISBN: 9780260539649 List Price: $9.57