apple-history.com / MacBook Pro (13-inch, Mid 2009)
RAM Upgrades For Apple MacBook (2009 - 2010) from OWC
Review: Apple's 2019 13-inch MacBook Pro is an excellent, inexpensive workhorse | AppleInsider
13-inch MacBook Late 2009 & 2010 Memory Installation Video - YouTube
macOS Big Sur 11.2.3 on a late 2009 MacBook : r/mac
MacBook Pro: How to remove or install memory - Apple Support
Macbook Pro Mid 2009 16 GB Ram | MacRumors Forums
A-Tech 16GB Kit (2x8GB) DDR3 1066MHz / 1067MHz PC3-8500 SODIMM RAM for Apple MacBook (13 inch, Mid 2010), MacBook Pro (13 inch, Mid 2010), iMac (27 inch, Late 2009), Mac Mini (Mid 2010) at Amazon.com
MacBook Pro RAM Upgrades (Non-Retina) - OWC
It's old as heck but still kicking! Mid 2009 MacBook Pro (MacBook Pro 5,5) I'm hoping to use opencore legacy patcher to install Monterey on it. : r/ macbookpro
Apple MacBook Pro with Retina Display (13-inch, 2013) review: Not a Retina MacBook Air, but awfully close - CNET
MacBook Pro | Core 2 Duo 2.53 GHz | 13 Inch | Mid 2009 - Techable.com
Review Apple MacBook Pro 13 Mid 2009 2.53 GHz - NotebookCheck.net Reviews
A-Tech 8GB (2 x 4GB) PC3-8500 DDR3 1066/1067 MHz RAM for MacBook, MacBook Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) | 204-Pin SODIMM Memory Kit at Amazon.com
MacBook (2006–2012) - Wikipedia
MacBook Pro - Wikipedia
Apple MacBook Pro (13-inch, Mid 2012) - i5 2.5 GHZ 8GB RAM 240GB SSD | eBay
A-Tech for Apple 8GB DDR3 1067MHz / 1066MHz PC3-8500 SODIMM Mid 2010 MacBook 13-inch
MacBook (13-inch, Late 2009) - Technical Specifications
Review: 2009 MacBook Pro 13-Inch Is Freakin Awesome | Cult of Mac
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com