Wallin, R.W., Bassett, R.L., and Eychaner, J.H., 1991, Ground-water transport of polycyclic aromatic hydrocarbons in association with humic substances in the Pinal Creek basin, Globe, Arizona, in Mallard, G.E., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program - Technical meeting, Monterey, California, March 11-15, 1991, Proceedings: U.S. Geological Survey Water-Resources Investigations Report 91-4034, p. 511-515.
