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1881 Section along 36th parallel … Exploration Book Section along 36th parallel … |
1881 Section along 37th parallel, … Exploration Book Section along 37th parallel … |
1881 III. Carboniferous. Exploration Book Carboniferous. J.C. McConnel … |
1881 IV. Carboniferous. Exploration Book Carboniferous. J.C. McConnel … |