I've had these for a few years. My father found most of them in West Texas and the Texas hill country. Most of them aren't perfect, but I'd still like to ID and value them. The large blank (I think) in the lower right corner I found close to Leakey, TX. Any help with ID and price or pointing me to a publication to use would be appreciated. Each black mark on the edge of the paper is 1 inch.
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