Winchell, N. H. 1839-1914. Natural gas in Minnesota. By N. H. Winchell. - St. Paul, The Pioneer Press Co., 1889. - 39 p. map. 25 cm. LCCN: gs 06000022 Subjects--Topical Terms: Natural gas--Minnesota. LC Class. No.: QE127 / .A22 no. 5 Dewey Class. No.: 557.76