• publisher: Washington, D.C. : U.S. Dept. of Agriculture
  • creator: Hartman, W. A. (William Albert), 1895- Black, John D. (John Donald), 1883-1960
  • contributor: Black, John D. (John Donald), 1883-1960.
  • Keyword: Agriculture Economic aspects Wisconsin. Agriculture Economic aspects Michigan. Agriculture Economic aspects Minnesota.
  • years: 1931.
  • pages: 86 p. :
  • notes: Caption title.
  • download: pdf file