. . . . . . "Surface water supply of the United States, 1961-65 Part 1 North Atlantic slope basins Volume 3 Basins from Maryland to York River ; prepared in cooperation with the States of Delaware ... [et al.]" . "Surface water supply of the United States, 1961-65. Part 1 North Atlantic slope basins Volume 3 Basins from Maryland to York River ; prepared in cooperation with the States of Delaware ... [et al.]"@en . . . . . . . . .