The radio station Don is listening to when his car breaks down, KOMA 1520, still exists on FM as KOMA 92.5 in the Oklahoma City metro area as of January, 2016.
On Unbreakable Kimmy Schmidt (2015), Jon Hamm's character lists Michael Crichton's The Andromeda Strain as one of his favorite books. In this episode, Don Draper has the same book among the paperbacks in his motel room for reading material.
This episode takes place during late September and early October of 1970.
Don is reading "The Godfather" (1969), by Mario Puzo, during his visit at the Oklahoma motel.
Pete Campbell promises his daughter, Tammy, that he'll take her to Friendly's. Friendly's was and is a popular restaurant chain in New England and the east coast, featuring their own name brand ice cream and their signature milkshake called a "Fribble".