ENCYCLOPEDIA: ORIGIN OF

DEMON: 1 issue (Superman 191, Nov 1966)
Eterno: 1 issue (Action Comics 343, Nov 1966)
Parasite: 1 issue (Action Comics 340, Aug 1966)
Sacred Star of Sinsubhani: 1 issue (Superman 191, Nov 1966)
Sun Boy: 1 issue (Adventure Comics 348, Sep 1966)