Previous indexer attributed the art to Paul Norris.
On the bottom of an ad page.
Tentative art credit from Jim Vadeboncoeur Jr. index card attached to online scanned version.
Tentative Ann Brewster art credit from Jim Vadeboncoeur Jr. index card attached to online scanned version.
Jim Vadeboncoeur Jr. index card attached to online scanned version suggests the art was done by Bill Ward and Dan Barry under the Binder shop name.