Editore: Bureau of Chemistry and Soils, Washington, DC, 1929
StapleBound. Condizione: Good/NO DUSTJACKET. Photographs (illustratore). Washington, DC: Bureau of Chemistry and Soils. Good/NO DUSTJACKET. 1929. . StapleBound. Sm 4to., 36 pp. & fold-out map, cover rubbed, taped, spine splitting .