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3. Anderson T. W. An Introduction to Multivariate Statistical Analysis John Wiley & Sons New York N.Y. 1958 p. 19.
4. Athayde D. N. Myers C. F. Shelley P. E. Driscoll E. D. Mancini J. L. and Boyd G. B. “Preliminary Results of the Nationwide Urban Runoff Program ” Vol. 1 Water Planning Division U.S. EPA Washington D.C. 1981.
5. Stormwater Interception and Storage