The Origin, Distribution, and Airphoto Identification of United States Soils Jenkins, D. S. ; Belcher, D. J. ; Gregg, L. E. ; Woods, K. B. Abstract Publication: Soil Science Pub Date: March 1947 DOI: 10.1097/00010694-194703000-00011 Bibcode: 1947SoilS..63..250J