HP41 Repair: A beginner's guide to repairing your HP41 calculator (The Calculator Store books): Store, The Calculator: 9798682584574: Amazon.com: Books
FULL "Gummy Wheel" Repair for HP Calculator CARD READERS: HP65 HP67 HP95 & HP97 | eBay
HP Scientific Calculator 35s | Officeworks
HP Calculator Repair - Vintage HP 45 RPN Calculator Gets a New Lease on Life - YouTube
HP Calculator Repair Kit
HP Calculator Repair Kit
HP 41C Repair - The Calculator Store
A Classic HP for you today! – Jamel Tayeb
inside the HP41-cv calculator (e3, pics): Olympus SLR Talk Forum: Digital Photography Review