Thomas, H. E. (1951). The conservation of ground water: A survey of the present ground-water situation in the United States. New York: McGraw-Hill.
Παραπομπή Chicago StyleThomas, H. E. The Conservation of Ground Water: A Survey of the Present Ground-water Situation in the United States. New York: McGraw-Hill, 1951.
Παραπομπή MLAThomas, H. E. The Conservation of Ground Water: A Survey of the Present Ground-water Situation in the United States. New York: McGraw-Hill, 1951.
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