Analytical results and sample locality maps of stream-sediment and heavy-mineral-concentrate samples from the San Juan National Forest, Archuleta, Dolores, Hinsdale, La Plata, Mineral, Montezuma, Rio Grande, San Juan, and San Miguel Counties, Colorado - Barton, Harlan; Fey, D.; Motooka, J.; Hopkins, R. (Open-File Report, 1993)