Search Results       Your search for [author]Thomas, Harold Edgar, 1906- returned 1 record.           The conservation of ground water : a survey of the present ground-water situation in the United States. by Thomas, Harold Edgar, 1906-; New York: McGraw-Hill, 1951. Subject: Water, Underground -- United States; Water-supply -- United States; Water conservation -- United States.          Add to Book Cart Relevance: 22.59%