J.S. · R.J. · R.S. · Ruth J. · Ruth Silverstein
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| E-Z Spanish | 978-0-7641-4129-4 | 2009 | Allen Pomerantz Ph.D. · Heywood Wald Ph.D. |
| Spanish Now!: A Level One Workbook | 978-0-8120-0928-6 | 1981 | |
| Spanish Now! Level 1 | 978-0-7641-2933-9 | 2005 | Ruth Silverstein · Allen Pomerantz Ph.D. · Haywood Wald Ph.D. |
| Spanish Now!: Level 1 | 978-0-8120-8483-2 | 1997 | Heywood Wald |
| Spanish Now!, Level 1 | 978-0-8120-9653-8 | 1997 | Heywood Wald · Allen Pomerantz |
| Spanish the Easy Way | 978-0-7641-1974-3 | 2003 | Allen, Ph.D Pomerantz · Wald, Ph.D Heywood |
| Spanish the Easy Way | 978-0-8120-9412-1 | 1996 | Allen Pomerantz · Heywood Wald · Ruth J. Siverstein · Ruth J. Spanish Now Silverstein |
| Spanish the Easy Way | 978-0-8120-4204-7 | 1989 | Allen Pomerantz · Heywood Wald |