Merrill, C. W., Henderson, C. W., & Kiessling, O. E. (1937). Small-scale placer mines as a source of gold, employment, and livelihood in 1935. Works Progress Administration, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques.
Cita Chicago Style (17a ed.)Merrill, Charles W., Charles W. Henderson, y O. E. Kiessling. Small-scale Placer Mines as a Source of Gold, Employment, and Livelihood in 1935. Philadelphia: Works Progress Administration, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques, 1937.
Cita MLA (8a ed.)Merrill, Charles W., et al. Small-scale Placer Mines as a Source of Gold, Employment, and Livelihood in 1935. Works Progress Administration, National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques, 1937.