Unusual Mars Surface Features

Glenn Dale: Mars Research, 1988. Fourth Edition. Paperback. Very Good. Illustrations and artwork by Grace DiPietro. Viking art by Jim Butcher. Signed by DiPietro and Brandenburg on the title page. Very Good. Wraps lightly worn at the edges a few scuffs to the head and foot of the spine. Firmly bound with two staples, clean internally. An analysis of the images taken by the Mariner and Viking Missions. From the collection of ufologist Tom Benson.