Krantz, F. A.; Leach, J. G.; Ruggles, A. G.; Nesom, G. H.; White, H. B..
Potato growing (revised October, 1927).
University of Minnesota. College of Agriculture. Extension Division.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.