On-sale date from Comic Reader #92.
letter column in Secrets of Sinister House (DC, 1972 series) #13 credits Jack Sparling with cover.
Letters from: Gerard Triano, Paul Edwards, Art Stampler, Casey Wintergreen.
Credits from Showcase Presents: Secrets of Sinister House (DC, 2010 series) #[nn]. Adams inks, with an assist by Buckler, confirmed on the Neal Adams Checklist.