Roe, H. B.2017-02-072017-02-071924-06Roe, H.B. Farm drainage methods: construction, 1908-1922. 1924. Saint Paul, Minn.: University of Minnesota. Agricultural Experiment Station. Bulletin 217, page 1-44https://hdl.handle.net/11299/183956This archival publication may not reflect current scientific knowledge or recommendations. Current information available from University of Minnesota Agricultural Experiment Station: http://www.maes.umn.edu/enNewsletter or Bulletin