All Credited Contributors: • RICHARD WELLER • FREDERICK STEINER • SEAN BURKHOLDER • CHRISTOPHER MARCINKOSKI • SARAH A. WILLIG • KAREN M’CLOSKEY • KEITH VANDERSYS • SONJA DÜMPELMANN • REBECCA POPOWSKY • SARAI WILLIAMS • LUCINDA SANDERS • BILLY FLEMING • JAMES BILLINGSLEY • ROBERT GERARD PIETRUSKO • ELLEN NEISES • MATTHIJS BOUW • VALERIO MORABITO • NICHOLAS PEVZNER • DAVID GOUVENEUR • TATUM L. HANDSRichard J. Weller is the Meyerson Chair of Urbanism and professor and chair of Landscape Architecture and executive director of the McHarg Center at the University of Pennsylvania. He has published eight books and over 120 single-authored academic papers. He is also creative director of the interdisciplinary journal of landscape architecture LA+ Journal.Dr. Tatum L. Hands is a lecturer and editor-in-chief of LA+ Interdisciplinary Journal of Landscape Architecture at the University of Pennsylvania.