| Brighter Child® Handwriting: Printing (Brighter | | |
| Brighter Child® English and Grammar, Grade 4 | | |
| Brighter Child? English and Grammar, Grade 6 | | |
| Brighter Child® Spanish, Grade 3 (Brighter Child | | |
| Dif - nummer 1 | Fons Burger (hoofdredacteur) | Brighter World etc. |
| DIF - maakt het verschil (nr. 4, 2007) | | |
| DIF 5 Maakt het verschil | Fons Burger | Brighter World / Dif Books Bv |
| The family physician: being a collection of | SMITH, Hugh | |
| Comparative Analysis of Differential Item | SIAMISANG, Fernando Tapologo | |
| Mucoviscidose et ostéoporose: quel lien vers | DIF, Fariel | |
| DIF / 2 maakt het verschil | | |
| Dif set 10 ex / 2 | Burger, F. | |
| DIF / 3 | | |
| Num Sol Bound Val Prob Ord Dif Equat Z | | |
| Dirty Laundry Pile: Poems in Dif | | |
| El lado f?cil de la gente dif?cil / The Easier | | |
| Decisiones Dif?ciles / Difficult Decisions | | |
| La Buena Econom?a Para Tiempos Dif?ciles / Good | | |
| Flashlight: (Picture Books, Wordless Books for | | |
| The Angry Dragon: (Childrens books about Anger, | | |
