Contracts : cases and materials / by E. Allan Farnsworth, Late Alfred McCormack Professor of Law, Columbia University; Carol Sanger, Barbara Aronstein Black Professor of Law, Columbia University; Neil B. Cohen, Jeffrey D. Forchelli Professor of Law, Brooklyn Law School; Richard R.W. Brooks, Charles Keller Beekman Professor of Law, Columbia Law School; Larry T. Garvin, Lawrence D. Stanley Professor of Law, Ohio State University.