Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
Lenovo Thinkpad R61 Upgrades | IMNC - YouTube
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 R61i - RAM Replacement - YouTube
IBM Lenovo R60/R61pamięc RAM, IBM Lenovo R60/R61 upgrade RAM - YouTube
Lenovo ThinkPad R61 specifications
Foreign Used Lenovo ThinkPad R61 2GB 15"/15.6" Laptop...
LENOVO THINKPAD R61 Intel Core 2 Duo 3GB RAM 160GB HDD WIFI LINUX MINT | eBay
CMS 8GB (2X4GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with IBM Lenovo® Thinkpad T61, T61P Ddr2 Pc5300 Sodimm - B116 at Amazon.com
Lenovo ThinkPad Laptop R61 14.1" Core 2 Duo 2.1GHz 4GB Ram 250GB Windows 10 Home
Lenovo ThinkPad Laptop R61 14.1" Core 2 Duo 2.1GHz 4GB Ram 250GB Windows 10 Home
Compatible Laptop Battery for IBM R61 Battery for IBM ThinkPad R61 Series (14.1”widescreen), ThinkPad R61i Series (14.1”widescreen), ThinkPad T61 1959 – 1 Year Warranty – Arikart