1.
 |  | Title: Problems in Contract Law: Cases and Materials by Charles L. Knapp, Nathan M. Crystal, Harry G. Prince ISBN: 0735527148 Publisher: Aspen Publishers, Inc. Pub. Date: April, 2003 List Price: $86.00 Amazon.com Price: $86.00 |
2.
 |  | Title: Rules of Contract Law 2003-2004 by Charles L. Knapp, Nathan M. Crystal, Harry G. Prince ISBN: 0735528128 Publisher: Aspen Publishers, Inc. Pub. Date: June, 2003 List Price: $32.95 Amazon.com Price: $32.95 |
3.
 |  | Title: Rules of Contract Law : Selections from the Uniform Commercial Code, the CISG, the Restatement (Second) of Contracts, and the UNIDROIT Principles with Material on Contract Drafting and Sample Examination Questions and Answers (1999-2000 Statutory Supplement) by Nathan M. Crystal, Charles L. Knapp, Harry G. Prince, Harry P. Prince ISBN: 073550055X Publisher: Aspen Publishers, Inc. Pub. Date: 1999 List Price: $22.95 Amazon.com Price: $22.95 |
4.
 |  | Title: Rules of Contract Law: Statutory Supplement 2001-2002 by Nathan M. Crystal, Charles L. Knapp, Harry G. Prince ISBN: 0735519943 Publisher: Panel Pub Pub. Date: June, 2001 List Price: $27.95 Amazon.com Price: $27.95 |