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[Place of publication not gi … Placer claim of E. L. Hubbar … Undated |
Boulder (Colo.) Map showing Chingis Kahn gro … Drumm, Henry A., 1857-1937 1907 |
[Place of publication not gi … Map of White Placer along Bo … |
[Place of publication not gi … Map of the Lincoln Group Belser, Carl 1934 |
[Place of publication not gi … Map of Stone and Timber clai … |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1928 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1928 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1928 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1928 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1932 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1932 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1935 |
[Place of publication not gi … Map of Boulder County claims … [1919] |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1917 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1925 |
Boulder (Colo.) Map of Boulder County claims … Drumm, Henry A., 1857-1937 1928 |
[Place of publication not gi … Longitudinal section Red Sig … |
[Place of publication not gi … Boulder County Mine Donora Mining Co. 1942 |
[Place of publication not gi … Workings of Richmond & Fairf … |
[Denver (Colo.)] Township no. 1 south, range … Johnson, M. 1930 |
[Place of publication not gi … Township No. 1 south, range … [Tim] 1930 |
[Place of publication not gi … Township No. 1 south, range … 1930 |
[Place of publication not gi … Tenderfoot Shaft Wahlstrom, Ernest E. (Ernest … 1944 |
[Place of publication not gi … Sugar Loaf Mining District Undated |
[Place of publication not gi … Star Mine Wahlstrom, Ernest E. (Ernest … 1943 |
[Place of publication not gi … Star Mine Wahlstrom, Ernest E. (Ernest … 1943 |
[Place of publication not gi … Star Mine Wahlstrom, Ernest E. (Ernest … 1943 |
[Place of publication not gi … Star Mine Wahlstrom, Ernest E. (Ernest … 1943 |
Boulder (Colo.) Rambler Mine Wahlstrom, Ernest E. Undated |
[Place of publication not gi … Pueblo Belle and adjacent wo … Belser, Carl |
McKeesport (Pa.) Prospect Tunnel Under Hurric … Wahlstrom, Ernest E. (Ernest … [1944] |
Boulder (Colo.) Plat of Time Tunnel and Wyno … Drumm, Henry A., 1857-1937 1936 |
Denver (Colo.) Plat of the oil lands of Lon … Undated |
[Denver (Colo.)] Plat of the Claim of C.H. Pa … Kittredge, John W. 1905 |
Boulder (Colo.) Plat of Sections 14, 15, 22 … Undated |
[Place of publication not gi … Plat of Cripple Creek Distri … Undated |
[Place of publication not gi … Plan map showing workings of … Belser, Carl 1935 |
[Place of publication not gi … Plan map of Fairfax, Minneap … Belser, Carl |
[Place of publication not gi … Mining claims near the Golde … Bird, H. L. 1934 |
[Place of publication not gi … Mineral survey No. 20605 Byron, J. E. [1939] |
[Place of publication not gi … Map showing survey at Fairfa … Boyle, Clyde R. 1936 |
[Place of publication not gi … Map Showing Properties of Fi … Byron, J. E. (1890-1973) 1949 |
[Place of publication not gi … Map showing Pennsylvania and … Undated |
Boulder (Colo.) Map showing location of the … Drumm, Henry A., 1857-1937 1931 |
[Place of publication not gi … Map showing Fitchburg-Gray c … 1936 |
[Place of publication not gi … Map showing Fitchburg-Gray c … 1936 |
[Place of publication not gi … Map of tunnel plans for Boul … Undated |
[Place of publication not gi … Map of topographical feature … Undated |
Boulder (Colo.) Map of the Gladys Mine and a … Drumm, Henry A., 1857-1937 1935 |
Boulder (Colo.) Map of the Gladys Mine and A … Drumm, Henry A., 1857-1937 1935 |