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
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Lenovo Thinkpad T61 RAM-Memory (2 Gig) | Replacement Part
How to replace fan in Lenovo ThinkPad T61 – Inside my laptop
T61 - Wiki
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) - Walmart.com