Crops. Statistics of field crops other than grains; compiled by Vivian M. Behenna, Lazar Volin, Charlotte M. Ward, Ruth Griffith, Chas. E. Gage, C. G. Carpenter, Lila Thompson, Caroline G. Gries, June A. Hodgkins, Elna Anderson, Ingeborg Gronvold, Florence C. Fitch, Jeanne Cavanagh, and Harold F. Clay.