Engineering and Mining Journal 1875-07-24: Vol 20 Iss 4 ( ) Title The Engineering and Mining Journal 1875-07-24: Vol 20 Iss 4 Volume 20 Publisher Mining
Engineering and Mining Journal 1886-07-24: Vol 42 Iss 4 ( ) Title The Engineering and Mining Journal 1886-07-24: Vol 42 Iss 4 Volume 42 Publisher Mining