found: Escape from the ivory tower, c1995:CIP t.p. (Xavier N. de Souza Briggs) galley (consultant based in New York City)
found: The geography of opportunity, c2005:ECIP t.p. (Xavier de Souza Briggs) data sh. (Asso. Prof. of Soci. & Urban Planning, MIT)
found: E-mail fr. pub.(Xavier N. de Souza Briggs & Xavier de Souza Briggs are the same person; auth. no longer uses his middle initial)
found: U.S. copyright file, July 10, 2009(Briggs, Xavier DeSouza)
found: Massachusetts Institute of Technology, Department of Urban Studies and Planning, faculty Web site, July 10, 2009(Briggs, Xavier de Souza : PhD; associate professor of sociology and urban planning; Xavier Briggs)
found: Digital dissertations, July 20, 2009(Briggs, Xavier De Souza, Ph. D., Columbia University, 1996--Brown kids in white suburbs)