1930. Adams, J. E. (James Edward), 1898-, Burke, R. T. Avon (Richard Thomas Avon), 1878-cartographer., Bushnell, T. M. (Thomas Mark),1889-1976, Simmons, C. S. (Charles Shaffer),1900-cartographer., and Ulrich, H. P. (Herbert Paul), 1904-cartographer. Shows soil types classification by colors and symbols. 'Field operations Bureau of Chemistry and Soils 1930. 'Williams & Heintz Co. Wash. D.C.' Sca... Bureau of Chemistry and Soils.
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1937. Ulrich, H. P. (Herbert Paul), 1904-cartographer. Shows soils types classification by colors and symbols.; Surveyed in 1937. Series 1937.; Lith. A. Hoen & Co., Inc. Scale 1:24,000; Polyconic projec... The Bureau.
1938. Ulrich, H. P. (Herbert Paul), 1904-cartographer. Shows soil types classification by colors and symbols.; Surveyed in 1938. Series 1938. Scale 1:31,680. 2 inches = 1 mile; Polyconic projection. The Bureau.