R. Rowntree
Pickett, Steward T. A., W.R. Burch, S.E. Dalton, T. W. Foresman, Morgan Grove, and R. Rowntree. 1997. “A Conceptual Framework For The Study Of Human Ecosystems In Urban Areas. [Special Issue Entitled, "Baltimore-Washington Integrated Regional Framework."]”. Urban Ecosyst. 1: 185-200.