Preston, R. N., & Preston, M. L. (2000). Idaho gold & gems maps, then and now: Gold/silver, agate, topaz, corundum, quartz, garnet, jasper, opal, petrified wood, feldspar. R.N./M.L. Preston.
Cita Chicago Style (17a ed.)Preston, Ralph N., y M. L. Preston. Idaho Gold & Gems Maps, Then and Now: Gold/silver, Agate, Topaz, Corundum, Quartz, Garnet, Jasper, Opal, Petrified Wood, Feldspar. [United States]: R.N./M.L. Preston, 2000.
Cita MLA (8a ed.)Preston, Ralph N., y M. L. Preston. Idaho Gold & Gems Maps, Then and Now: Gold/silver, Agate, Topaz, Corundum, Quartz, Garnet, Jasper, Opal, Petrified Wood, Feldspar. R.N./M.L. Preston, 2000.
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