Originally Posted by Asterix

As for internet sources, they vary as you say. There is one French site however that I feel is decent and simple enough to follow. Hope this helps:

Ordre de bataille de l'Armée de Terre, 10 mai 1940

As for book sources, while Osprey Men-at-Arms series tend to be general in information, the one on the French Army of WW 2 (two parts, #1 and #2) are actually very good. Both contain very detailed French order of battles for 1939-1940 (1st volume) and Free French 1940-1945 (2nd volume). The series numbers for these two books are #315 and #318.