Dictionary of Fundamental Theology. Rene Latourelle, ed. BT 1102 .D5813 REFERENCE
Probably the best place to begin. See section I 'Fundamental Christology'
and section IV 'Christology : Various Approaches'
The Modern Theologians. BT 28 .M59 1997 Reference Fl. 1
use index under 'Christology' for Christology of various theologians
The Cambridge Companion to Jesus. BT 301.2 .C346 2001 Reference Fl. 1
Among others, see chapter 'Jesus in Christian Doctrine'
Encyclopedia of Religion. BL 31 .E46 1987 vol. 8 Reference Fl. 1
see entry for 'Jesus--Christological developments'
New Catholic Encyclopedia. BX 841 .N44 2003 Reference Fl. 1
see entries for 'Christology' vol. 3 and
'Jesus Christ (in theology)' vol. 7
Anchor Bible Dictionary. BS 440 .A54 1992 Reference Fl. 1
see entry for 'Christology' in vol. 1