Sutherland, Ronald J., and Richard G. Walsh. “Effect of Distance on the Preservation Value of Water Quality”. Land Economics, vol. 61, no. 3, 1985, p. 281, https://doi.org/10.2307/3145843.
Sutherland, R. J., & Walsh, R. G. (1985). Effect of Distance on the Preservation Value of Water Quality. Land Economics, 61(3), 281. https://doi.org/10.2307/3145843
Sutherland RJ, Walsh RG. Effect of Distance on the Preservation Value of Water Quality. Land Economics. 1985;61(3):281.