Kathleen Stassen Berger ; with the assistance of Ross A. Thompson. Laurence Perrine with the assistance of Thomas R. Arp. Laurence Perrine, with the assistance of Thomas R. Arp. by Thomas B. Nelson, with the assistance of Hans B. Lockhoven. edited by John Algeo, with the assistance of Adele S. Algeo. Robert H. Frank, Ben S. Bernanke ; with the assistance of Roger T. Kaufman. Robert Gilpin, with the assistance of Jean M. Gilpin. Steven I. Hajdu, with the assistance of Eva M. Hajdu. edited by Dexter H. Howard ; with the assistance of Lois F. Howard.