The Pancam website is an especially convenient resource for getting color-processed images. This includes single frames and multi-frame panoramas and small mosaics.

"Petrology, Stratigraphy, and Geologic History of Husband Hill, Gusev Crater, Mars" This is Shoshanna Cole's PhD thesis. It is a single coherent work that characterizes all of the rock classes that the rover encountered on Husband Hill and the West Spur, and presents a geologic map and cross-section.

"Estimating the True Colors of Mars" by Jim Bell and Dmitry Savransky (Cornell University) briefly describes the process used to produce approximately true color images from MER Pancam image data.

"Creating False Color Images of Mars" by Jim Bell and Dmitry Savransky (Arizona State University, Cornell University)" briefly describes the process used to produce false-color images from MER Pancam image data.

Astronomy from Gusev! This page has nighttime images that Spirit acquired of stars, moons, and potentially meteors.

This is a recording of a presentation at The Exploratorium by sociologist Dr. Janet Vertesi, who studied the MER team. It is aimed at a general audience, and titled "Seeing like a Rover".

"The Mars Exploration Rovers Update Archives: A comprehensive accounting of the Spirit and Opportunity rovers". From 2004 to 2019, journalist (and MER PORTAL Interview Consultant) A.J.S. Rayl followed the adventures of the Mars Exploration Rovers Spirit and Opportunity for The Planetary Society. Her exclusive coverage is archived here.