...thoroughly revised, showing oil and gas pools, many anticlinal lines not heretofore shown, and also the names and post-office addresses of all the principal...coal mining operators in West Virginia up to July ist, 1917. Map issued under date of October ist, 1917; scale, 8 miles to the inch. Price, folded in...

...Survey. Thoroughly revised, showing oil and gas pools, many anticinal lines not heretofore shown, and also booklet giving the names and post-office addresses of all the principal coal-mining operators hi West Virginia up to July i, 1921. Scale, 8 miles to the inch. Price, folded...