USGS1992Analytical results and sample locality map of rock samples from the Hayfork 30' x 1° quadrangle (northwest quarter of the Redding 1° x 2° quadrangle), Humboldt and Trinity counties, CaliforniaNo abstract available.California↗
USGS1990Analytical results and sample locality map of stream-sediment and panned concentrate samples from the Hayfork 1:100, 000 quadrangle, (northwest quarter of the Redding, California 1:250,000 quadrangle) Trinity and Humboldt Counties, CaliforniaNo abstract available.California↗