Part of illustrative material is folded. Cover title: Delaware River basin report.

v. 1. Main report. -- Appendices.: -- v. 2. History of investigation. B. Economic base survey. -- v. 3. C. Water use and stream quality. D. Flood damages. E. Navigation. F. Power markets and valuation of power. -- v. 4. G. Water for irrigation and rural use. H. Fluvial sediment. I. Recreation resources. -- v. 5. J. Fish and wildlife resources. K. Use and management of land and cover resources. -- v. 6. L. Insects of public health importance. M. Hydrology. -- v. 7. N. General geology and ground water. -- v. 8. O. Intrastate water resources survey, State of Delaware. -- v. 9. P. Gross and net water needs. Q. Formation of the plan of development. R. Water control at intermediate upstream levels. S. Salt water barrier. -- v. 10. T. Hydroelectric power. U. Project designs and cost estimates. -- v. 11. V. Benefits and cost allocations. W. Recreation needs and appraisals. X. Operating organization.