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Editore: Commonwealth of Pennsylvania, Chicago, 1941
Prima edizione
Soft Cover. Condizione: Very Good+. First Edition. Clean tan soft cover has black title on front. Text tight, clean & intact. Map and table illustrations, including a fold-out. A systematic investigation of the ground-water that began in 1925 and has continued to the present. Geology; Maps & Table Illustrations; 8vo 8" - 9" tall; 32 pages.