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Map showing areas serviced by public water-supply agencies in 1973 greater Pittsburgh region, southwestern Pennsylvania
Robert M. Beall
1974, Miscellaneous Field Studies Map 607
Urban water planning, development, and management are many sectored, costly efforts, subject to a multitude of controls and demands including those imposed by nature. One primary concern in development is for providing a dependable and safe water supply. In spite of a bountiful natural availability, the process of satisfying consumer...
Bottom features and processes related to drifting ice on the Arctic shelf, Alaska
Erk Reimnitz, Peter W. Barnes, Tau Rho Alpha
1973, Miscellaneous Field Studies Map 532
Early investigations of artic shelf regions led to the hypothesis that certain micro-relief forms are related to the action of grounded ice (for example, Rex, 1955). Since the introduction of side-scan sonar as a tool for ocean-floor surveys, a number of workers have described the occurrence of linear bottom features...