Scheers, S. La Gaule Belgique: Numismatique Celtique. (Louvian, 1983).
Belgian Gaul: Celtic Coins.
Comprehensive for the Celtic coinage of the area bounded by the river Seine and the Marne to the South, and the Rhine to the East and North. 19 x 24, 986 pages + XXVIII plates.
Also see:
Scheers S-M
Essays Scheers
Scheers Pixtilos
Scheers Eburovices
Brenot-Sheers
Celtic| and Tribal| Coins| for Sale| in the Forum| Ancient| Coins| Shop|.