Journal _bug_'s Journal: Mars Rover/Lander Images
Viking Missions
http://nssdc.gsfc.nasa.gov/planetary/viking.html
Images FTP
ftp://nssdcftp.gsfc.nasa.gov/miscellaneous/planetary/viking/images
NSSDC Image Catalog
http://nssdc.gsfc.nasa.gov/imgcat/html/group_page/MR.html