446 resultados para Illinois. Division of Soil and Water Conservation


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Bibliography: p. 29-30.

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Cover title.

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Vols. for 1920/21-1930 reprinted from the 4th-13th Administrative report.

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Contract no. 12-14-100-758 (41) between the Agricultural Research Service and the Santa Barbara County Water Agency.

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"Conducted by the Illinois State Geological Survey in cooperation with the Boone County Board, Winnebago County Board, Boone County Soil and Water Conservation District, Winnebage County Soil and Water Conservation District and Rock Valley College."