Source areas of salinity and trends of salt loads in streamflow in the upper Colorado River, Texas

Quality of surface waters of the United States, 1968, Part 2, South Atlantic slope and eastern Gulf of Mexico basins

Quality of surface waters of the United States, 1968, Part 6, Missouri River basin

Quality of surface waters of the United States, 1968, Parts 9 and 10, Colorado River basin and the Great Basin

Surface water supply of the United States, 1966-70, Part 1, North Atlantic slope basins, v. 2, Basins from New York to Delaware

Surface water supply of the United States, 1966-70, Part 4, St. Lawrence River basin, v. 2, St. Lawrence River basin below Lake Huron

Surface water supply of the United States, 1966-70, Part 5, Hudson Bay and upper Mississippi River basins, v. 1, Hudson Bay basin

Surface water supply of the United States, 1966-70, Part 6, Missouri River basin, v. 2, Missouri River basin from Williston, North Dakota to Sioux City, Iowa

Surface water supply of the United States, 1966-70, Part 11, Pacific Slope basins in California, v. 4, northern Central Valley basins

Surface water supply of the United States, 1966-70, Part 11, Pacific slope basins in California, v. 2, Basins from Arroyo Grande to Oregon State Line except Central Valley

Ground-water levels in the United States, 1968-72, northeastern states

Quality of surface waters of the United States, 1969, Parts 4 and 5, St. Lawrence River basin and Hudson Bay and Upper Mississippi River basins

Quality of surface waters of the United States, 1969, Parts 12-16, North Pacific slope basins, Alaska, Hawaii, and other Pacific areas

Quality of surface waters of the United States, 1970, Part 1, North Atlantic slope basins

Quality of surface waters of the United States, 1969, part 8, western Gulf of Mexico basin