Here's a little gift. The link contains a 1977 Arkansas control section book and a 1978 Oklahoma control section book. These books contain maps of the state highway system for all 75 and 77 counties respectively, showing the route number, section number, and mileage for each section.
https://drive.google.com/drive/folders/1mspkcCf0HWXWkP5nmPK4avbXkFVm5Faf?usp=sharing