Biodiversity Heritage Library
By "Elwell, John Ambrose, 1897-"
Soil survey of Louisa County, Iowa / by L. Vincent Davis, Elwell, J. Ambrose.
By: Davis, L. Vincent. - Elwell, John Ambrose,
Publication info: U.S. Dept. of Agriculture,1921.
Contributed by: University of California Libraries (archive.org)