00779cam a22002291 4500 gs 37000221 DLC 20260227111342.0 820909s1936 iauab b 000 0 eng c gs 37000221 (OCoLC)8758186 U.S. Geol. survey. Library. CU-A DLC QE33 .S57 Smith, John E. (John Eliphalet), 1878- Lesson helps in agricultral geology, for use with Emerson's Agricultural geology (Wiley & sons) by John E. Smith. [Ames, Iowa?] 1936. 48 p. illus. (map) 23 cm. "References": p. 8, 42-43. Geology. Soils. Emerson, Frederick V. (Frederick Valentine), 1871-1919. Agricultural geology. 27371 27371