Mark Manhart
Mark Manhart is credited as writer on 6 issues in grailworth's catalog, 6 issues of them across 5 series we value.
Every issue
Blue Ribbon Comics (1983) 1 issue
House of Mystery (1951) 1 issue
Secrets of Haunted House (1975) 2 issues
Sgt. Rock Special (1988) 1 issue
Weird War Tales (1971) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.