IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com
LENOVO THINKPAD R61 sous Windows 10 - Ram 4 Go- N°040903 - GRADE B
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Lenovo ThinkPad R61 14" Laptop For Parts No Keyboard/HDD/RAM/Charger JR | eBay
Refurbished Lenovo ThinkPad R61 Laptop Core 2 Duo 2 Gb Ram 160Gb HDD Windows 7