Title from verso. Full caption from verso reads: "Equipment used for seismic exploration on Alaska's North Slope in 1969 includes a shot hole drill, at left foreground, and a Nodwell tracked vehicle at center. At right in one of the portable...
Title from verso. "Seismic exploration 'cat' train, in the foreground, was at work on Alaska's North slope in 1969 while exploratory drilling continued nearby. (Atlantic Richfield photo)."