Biblio

M. R. Collins, Cole, J. O., Westersund, C. M., y Paris, D. B., «Assessing roughing filtration design variables», Water supply : the review journal of the International Water Supply Association, pp. p. SS 5.29 - 5.40: 9 fig., 11 tab., 1994.

M. R. Collins, Roccaro, J. V., Cole, J. O., y 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.

M. J. D. Graham y Collins, M. R., «Slow sand filtration : an international compilation of recent scientific and operational developments». American Water Works Association, Denver, CO, USA, p. xi, 322 p.: fig., tab., 1994.