IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
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
2Gb (1X2Gb) Memory RAM Compatible with Lenovo Thinkpad R61 Notebook Series By CMS A38 - Computer Memory Solutions