Abstract
PETER W. HOUSE has, since November of 1971, been with the U.S. Environmental Protection Agency where he is assistant director of the Washington Environ mental Research Center in the office of Research and Development. He is the former president of Envirometrics, Inc. During his four and one-half years at the Washington Center for Metropolitan Studies and Envirometrics (April 1967-October 1971) he directed the development of three urban operation al simulation models, including the CITY models and the RIVER BASIN MODEL.

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