who are the sisters that they refer to in chapter 11?

In this chapter we are explained Odessa’s rivalry with Midland. Both towns had grown out of the West Texas oil fields. Both towns ride the boom and bust waves that hit the oil economy. Perhaps their similarities are the reason for their rivalry. They are sister cities to be sure but people in Odessa would make up differences drawn from historical reputation and innuendo. Midland thus became the town of the “fair-haired, goody-goody” people and Odessa became the rebellious “naughty” ones (195).