Wiltsee, E. A. (1931). The pioneer miner and the pack mule express. California Historical Society.
Cita Chicago Style (17a ed.)Wiltsee, Ernest A. The Pioneer Miner and the Pack Mule Express. San Francisco: California Historical Society, 1931.
Cita MLA (8a ed.)Wiltsee, Ernest A. The Pioneer Miner and the Pack Mule Express. California Historical Society, 1931.
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