8GB 2X4GB Compatible Memory for Lenovo Thinkpad T61 T61p DDR2 PC2-5300 SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
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
2GB [1x2GB] RAM Memory Upgrade for the IBM Lenovo Thinkpad T61 and T61p Laptops | eBay
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Lenovo Thinkpad R61 Upgrades | IMNC - YouTube
Lenovo Thinkpad T61 RAM-Memory (2 Gig) | Replacement Part
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide