A listing in The Amazing World of DC Comics (DC, 1974 series) #12 (July 1976), crediting Ernie Chua and Alfredo Alcala, is incorrect. The artist's signature is dated 1976.
Per Error Report #11084, Richard Gagnon disagrees, "...I would very definitely say that the AWODC listing *is* correct. Chua and Alcala's inking styles are quite different."
Letters from: Ross M. Ward, Paul Nagyobb, Philip M. Botwinick, and Carl Bowlin.