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
CMS 2GB (1X2GB) DDR2 5300 667MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad R61 Notebook Series - A38 - Walmart.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
Lenovo Thinkpad R61 Upgrades | IMNC - YouTube
Lenovo ThinkPad R61 Laptop 14.1" Core 2 Duo T7100 1.8GHz 80GB HD 1GB RAM NO OS | eBay
8GB (2X4GB) Memory PC2-5300 667Mhz DDR2 SODIMM RAM for Lenovo ThinkPad R61 at Amazon.com
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
OFFTEK 1GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R61 (7736-xxx) (DDR2-5300) Laptop Memory at Amazon.com