I just received my copy of the First Quarter 2010 issue of The Warbonnet, the fine publication of the Santa Fe Railway Historical & Modeling Society. In it is a long article (15 pages) on the Avard, OK connection between the ATSF and the SLSF.
I haven't read it yet, but much of the article deals with the Frisco, and provides much information on the interchange and run-through traffic between the two railroads and how important it was.
There is lots of Frisco stuff in the article - a really nice SLSF system map, SLSF & QA&P freight schedules from The Official Guide, and pics of SLSF 5005, 650, 801 & 802, 937, 907 (as BN 6657), and cabs 1272 and 1730 (as BN11704).
Good issue. The Warbonnet is one of the better railroad historical society publications.