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1861 Beckwith, Lieut., Schumann, … Valley of the Mud Lakes. Exploration Book |
1861 Beckwith, Lieut., Schumann, … Valley of Humboldt River at … Exploration Book |
1861 Beckwith, Lieut., Schumann, … Madelin Pass. Exploration Book |
1861 Beckwith, Lieut., Schumann, … West End of Madelin Pass. Exploration Book |
1861 Beckwith, Lieut., Schumann, … No. Slopes of the Sierra Nev … Exploration Book |
1861 Beckwith, Lieut., Schumann, … Portion, main mountain passa … Exploration Book |
1861 Beckwith, E.G. From the Mud Lakes to Pacifi … Exploration Book |