Show oil men attention the june issue of the mining re be viem viea will contain an interesting and valuable article on the green river oil fields 01 0 utah from the pen of wilbur 0 knight A B professor of the department de of mining and ami geology of the university of wyoming byomin g the article will be illustrated wi with th maps a geological section and half tones those desiring extra copies of this number should file their orders early orders for t TO or more copies will be filled at ten cents each |