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Start Over You searched for: Author Public Roads Bureau Remove constraint Author: Public Roads Bureau Publish Year Decade 1920 - 1929 Remove constraint Publish Year Decade: 1920 - 1929

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101. Terracing farm lands; [by C. E. Ramser].

105. Tile-trenching machinery; [by D. L. Yarnell].

106. Irrigation of alfalfa: [by Samuel Fortier].

110. Drainage of irrigated farms; [by R. A. Hart].