This issue has variants.
On-sale date from copyright registration.
Color credits confirmed by Anthony Tollin.
Letters on Detective Comics #572 from Douglas A. Puthoff, Thomas P. McNulty, Dale Coe, Frank Simonetti, T.M. Maple, Jim Ficken, Anne Guerra, and Chris Myers, with responses from Barbara Randall and a "From the Den" editorial by Denny O'Neil.