Rex, I'm guessing that the missing song was in the book forward. I notice that the list you've put up has Sourwood Mountain as the #12 song, yet in the following image (see second page of the screen that opens) it's listed as # 13. Just a guess, but it's all I can figure. Perhaps if there's someone out there with the book the 'mystery' will be solved.

https://www.etsy.com/ca/listing/249535116/30-and-1-folk-songs-from-the-southern?show_sold_out_detail=1&ref=nla_listing_details