by Jeff Scharp on March 10th, 2010, 10:04 pm
Here's a few that can get you started, though you'll have to read mostly French:
Les Mouvements celtiques du Ve au Ier siècle avant notre ère : actes du XXVIIIe colloque organisé à l'occasion du IXe Congrès international des sciences préhistoriques et protohistoriques, Nice, le 19 septembre 1976
by Paul Marie Duval; Václav Kruta (1979). Gives lots of drawings and associated finds. OCLC Number: 9558156
Les Celtes (L'Univers des formes) by Paul-Marie Duval (1977)
OCLC number: 461831200
The Prunay Workshop: Technical Examination of La Tene Bichrome Painted Pottery from Champagne, by V Rigby; A P Middleton; I C Freestone; in World Archaeology, Jun., 1989, vol. 21, no. 1, p. 1-16. ISSN: 0043-8243, OCLC Number: 482224978. This is excellent!
Brittany and the Atlantic Rim in the Later First Millennium BC, by Barry Cunliffe; in Oxford Journal of Archaeology, 19, no. 4 (2000): 367-386. ISSN: 0262-5253, OCLC Number: 366167073