Troyan, J.J.

Troyan, J.J., Norris, D.P. & Environmental Research Information Center -Cincinnati, OH, US, 1977. Alternatives for small wastewater treatment systems : cost/effectiveness analysis, (EPA-625/4-77-011) Cincinnati, OH, USA: US Environmental Protection Agency (EPA), Center for Environmental Research Information. Available at: http://fr.ircwash.org/sites/default/files/323.0-77AL-1.pdf.