CASIO fx-991DE PLUS Taschenrechner mit Tasche und Bed. anleitung in Hessen - Seeheim-Jugenheim | eBay Kleinanzeigen
Casio fx-991 De Plus Pocket Book. For Secondary Level 1 up to A-Level:Detailed Examples and Practice exercisesWith many Step By Step Videos on CD : Gruber, Helmut, Neumann, Robert: Amazon.de: Books