Mary Skrenes
Mary Skrenes is credited as writer on 64 issues, penciller on 1 issue and inker on 1 issue in grailworth's catalog, 36 issues of them across 23 series we value. That includes 1 key issue, such as House of Secrets #92 (1956). Characters first seen in issues they wrote or drew include Gingerbread Man and Joon Moon Yuc.
Key issues
Characters they introduced
Every issue
The Best of DC (1979) 1 issue
The Defenders (1972) 1 issue
Detective Comics (1937) 1 issue
House of Mystery (1951) 3 issues
House of Secrets (1956) 2 issues
Howard the Duck (1976) 2 issues
Howard the Duck Annual (1977) 1 issue
Journey into Mystery (1972) 1 issue
Marvel Presents (1975) 1 issue
Plastic Man (1966) 1 issue
Plop! (1973) 1 issue
Red Circle Sorcery (1974) 1 issue
Sojourn (1977) 2 issues
Star*Reach (1974) 2 issues
The Unexpected (1968) 1 issue
Weird War Tales (1971) 1 issue
Young Love (1963) 1 issue
Credits from the Grand Comics Database, CC BY-SA 4.0.