So I am out of element on this one and would like your input. Cleaning out an old house an saved a dozen or so copies or a magazine called the "Shell News" all from between 1953 and 1958 along with some 1950's copies of the "Wrangler". The Shell News appears to be a corporate magazine for employees but they have fantastic vintage photos and illustrations. The Wrangler appears to be a division newsletter for Shell for the West TX/NM area. I am having trouble finding out how to value. Not finding much in the way of resources for this kind of material. Any ideas?