IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
ThinkPad T61p Upgrade! - Thinkpads Forum
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