1. Map showing geology and sample localities and concentration of lead in nonmagnetic heavy-mineral concentrates from the Wallace 1⁰ x 2⁰ quadrangle, Montana and Idaho ; Map showing geology and sample localities and concentration of total lead in in in stream sediments from the Wallace 1⁰ x 2⁰ quadrangle, Montana and Idaho ; Map showing geology and sample localities and concentration of partially extractable lead in stream sediments from the Wallace 1⁰ x 2⁰ quadrangle, Montana [cartographic material] Yale Public content 1984. 2002-06-01T04:00:00Z. 2023-07-08T03:01:30Z. Geological Survey (U.S.). The Survey : [Books and Open-File Reports Section, distributor]. English. cartographic image. Public. Montana and Idaho.