1. E. S. Corbett , 1970 . The Management of Forested Watersheds for Domestic Water Supply. Proceedings of the Conference on Multiple Use of Southern Forests, Georgia Forest Research Council. Pine Mountain, Georgia.
2. Gerald W. Howe , 1977 . Oppurtunity Costs Associated With Quabbin Reservoir as a Single Use Watershed. Unpublished Masters Thesis, University of Massachusetts, Amherst, Massachusetts, p.45 .
3. Rhode Island Statewide Planning Program, 1974 . The Potential Values and Problems in Using Water Supply Reservoirs and Watersheds for Recreational Purposes, Providence, Rhode Island, Technical Paper Number 47, p.27 .