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Water resources data for California, 1974; Part 2: Water quality records
Water Resources Division, U.S. Geological Survey
1975, Water Data Report CA-74-2
Water-resources data for the 1974 water year for California include records of data for the chemical, physical, and biological characteristics of surface and ground water. These data were collected from designated sampling sites at predetermined intervals such as once daily, weekly, monthly, or less frequently, and at some sites data...
Landsliding in Allegheny County, Pennsylvania
Reginald Peter Briggs, John S. Pomeroy, William E. Davies
1975, Circular 728
Man should proceed with caution if modifications such as loading, excavation, or changes of the water regime are contemplated for slopes in Allegheny County, especially those slopes described on the map as highly sensitive to disturbance by man. Features indicative of unstable slope conditions include: cracks in buildings, yard walls,...