Are all the alternate racial traits included in the Advanced Race Guide, or is there another location that includes more or newer ones?
Most of them are in that book. The Advanced Player's Guide has earlier and less complete lists of traits for the core races, and a few can be found in other sources only (such as Jinx for halflings).
Most of them are in that book. The Advanced Player's Guide has earlier and less complete lists of traits for the core races, and a few can be found in other sources only (such as Jinx for halflings).
The few found in other sources, like Jinx for halflings, would these all be found in their race-specific sourcebook, such as halflings of Golarion?