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Filters: Keyword is roughing filtration and Author is Collins, M.R.  [Clear All Filters]
Collins, M.R., Roccaro, J.V., Cole, J.O., and Westersund, C.M., Evaluation of roughing filtration design variables. Denver, CO, USA: American Water Works Association, 1994, p. xxvii, 181 p.: 83 fig., 50 tab.
Collins, M.R., Eighmy, T.T., and Malley, J.P., Evaluating modifications to slow sand filters, Journal American Water Works Association, pp. p. 62-70: 7 fig., 5 tab., photogr., 1991.