Latitude: Ninety!
Written by
Bill Mantio (writer), Frank Robbins (pencils), Frank Springer (inks), Janice Cohen (colors), Joe Rosen (letters)
Released 1978
Solo graphic adventures printed in Man From Atlantis #6, July 1978 - 17 pages.
In Part 2 of 3 in the clash with Lars Skorba, Mark Harris finds himself in the region of the North Pole where "in the midst of the frozen polar wastes, Skorba had found a smoldering volcano and a land kept tropically hot and dangerous, complete with dinosaurs.