Federal
West key numbers - from West’s Analysis of American Law (West, 2013)
Second Floor Reference KF 242 .A1 .W47a 2013
Federal Courts 281-287 "Controversies Between Citizens of Different States"
Federal Courts 371-433 "State Laws as Rules of Decision."
Includes a) in general, b) decisions of state courts as authority, and c) application to particular matters.
State
For state law, there is not one specific conflicts of law key number. These are scattered among many areas of law in West’s digests.
Citators and Restatement (Second) of Conflict of Laws
LexisNexis Shepards - use the format: conflict of laws second sec. 1
Westlaw KeyCite - use the format: rest 2d confl s 20