TY - RPRT TI - Analytical data for stream sediment, heavy-mineral concentrate, and outcrop samples, Sur Medio region, departments of Ica, Ayacucho, and Huancavelica, Peru AU - Robert Eugene Learned AU - K. R. Long AU - R. L. Turner AU - Cesar C. Rios AU - Joe C. Rodriguez PY - 1994 DO - 10.3133/ofr94182c UR - https://pubs.usgs.gov/publication/ofr94182C ID - ofr94182C ER -