Cooper, T.P.Peck, F. W.Boss, Andrew2017-02-082017-02-081916-03Cooper, T.P.; Peck, F. W.; Boss, Andrew Labor Requirements of Crop Production. 1916. Saint Paul, Minn.: University of Minnesota. Agricultural Experiment Station. Bulletin 157, pages 2-55https://hdl.handle.net/11299/184034This 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