Memoir of the Geological Survey of the State of Delaware
Newark, DE: Delaware Geological Survey, University of Delaware
The following report of the geological survey of the state of Delaware, conducted in the years 1837 and 1838, embraces all the observations and examinations which were made during the continuance of the survey, including those contained in the first and second annual reports, already laid before the legislature.
Includes the application of the geological observations to agriculture.
Delaware Geological Survey , Booth, James Curtis, 1810-1888.