5 ESSENTIAL ELEMENTS FOR SOIL SURVEY INSTRUMENT

Subseries VIII.A. Slide transparencies, by region. 1942-1968. This subseries is predominantly made up of Kodachrome and Ektachrome slide transparencies from Kellogg's travels in The usa and abroad. Also involved are shade prints made out of a lot of the slides. Subjects depicted include things like: soils; landscape capabilities; agriculture; indiv