1.
 |  | Title: How to Prepare for the CLEP by William C. Doster, Elizabeth Schmid, Ruth Ward, Adrian W. Poitras ISBN: 0764120271 Publisher: Barrons Educational Series Pub. Date: May, 2003 List Price: $14.95 Amazon.com Price: $10.47 |
2.
 |  | Title: Barron's How to Prepare for the Clep Subject Examinations in College Composition and Freshman English (Clep Satellite Series) by William C. Doster, Mary Daly, Fran Hester, Franklin D. Hester ISBN: 0812006224 Publisher: Barrons Educational Series Pub. Date: September, 1978 List Price: $6.95 Amazon.com Price: $6.95 |
3.
 |  | Title: First Perspectives on Language by William C. Doster ISBN: 0458927805 Publisher: Book Sales Pub. Date: January, 1980 List Price: $8.98 Amazon.com Price: $8.98 |
4.
 |  | Title: Barron's How to Prepare for the College-Level Examination Program Clep by William C. Doster, Adrian W. Poitras ISBN: 0812029801 Publisher: Barrons Educational Series Pub. Date: February, 1990 List Price: $8.95 Amazon.com Price: $8.95 |
5.
 |  | Title: How to Prepare for the Clep College-Level Examination Program General Examinations (Barron's How to Prepare for the C L E P, College-Level Examination Program) by William C. Doster, Laurie Rozakis, Benjamin Grffith, Ruth S. Ward, Shirley O. Hockett, Adrian W. Poitras, Robert Bjork, Mark Willner ISBN: 0764104764 Publisher: Barrons Educational Series Pub. Date: February, 1999 List Price: $14.95 Amazon.com Price: $14.95 |
6.
 |  | Title: Barron's How to Prepare for the College-Level Examination Program, CLEP, General Examinations by Robert Bjork, William C. Doster ISBN: 0812024478 Publisher: Barron's Educational Series Pub. Date: October, 1983 List Price: $7.95 Amazon.com Price: $7.95 |