found: Science and engineering careers in the United States, 2009: ECIP t.p. (Daniel L. Goroff)
found: nuc87-14548: His A variational study of twist maps, 1984 (hdg. on NjP rept.: Goroff, Daniel Lewis)
found: Poincaré, H. New methods of celestial mechanics, c1993: t.p. (Daniel L. Goroff, Harvard Univ.)
found: Amazon.com, July 1, 2009 (Science and engineering careers in the United States, about the author: professor of mathematics and economics, Harvey Mudd College; codirector of the Sloan Scientific and Engineering Workforce Project based at the NBER)
found: Harvey Mudd College, Dept. of Mathematics, facilty Web site, July 1, 2009 (Daniel Goroff; professor of mathematics and humanities; on leave to Alfred P. Sloan Foundation, 2008-2009; Ph. D., Princeton University)
found: U.S. copyright file, July 1, 2009 (Goroff, Daniel Lewis, 1956- )
found: Digital dissertations, July 1, 2009 (Goroff, Daniel Lewis, Ph. D., Princeton University, 1984--A variational study of twist maps (Dynamics))