A. E. · A.F. · Alfred Friedl · E F.
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Modern physical science | 978-0-03-005054-1 | 1991 | |
| Modern Physical Science | 978-0-03-041510-4 | 1979 | George R. Tracy · Harry E. Tropp |
| MODERN PHYSICAL SCIENCE | 978-0-03-007381-6 | 1974 | George R. Tracy · Harry E. Tropp |
| Modern Physical Science: Exercises and Investigations | 978-0-03-059953-8 | 1983 | Frank V. Kitko |
| Teaching Science to Children | 978-0-07-554989-5 | 1991 | |
| Teaching Science to Children: An Inquiry Approach | 978-0-07-256395-5 | 2004 | Trish Koontz · Alfred Friedl · Tricia Koontz |
| Teaching Science to Children: An Inquiry Approach | 978-0-07-238057-6 | 2000 | Trish Koontz |
| Teaching Science to Children: An Inquiry Approach | 978-0-07-022459-9 | 1997 | |
| Teaching Science to Children: An Integrated Approach | 978-0-07-022423-0 | 1991 | |