Proposition 14
Tag 00JQ, permanent. Cite it as [Bourbaki, Tag 00JQ].
Algebra, VIII, p. 322, § 16. Other Descriptions of the Brauer Group
The following diagram commutes:
Br(L)/
Res
Br(L)/ .
This follows from Propositions 7 of VIII, p. 299 and 13 of VIII, p. 317.
Bourbaki sets the proof directly after the statement, and the corpus does not separate them, so what is above is the statement and its proof together.