Map of the Bering River coal field, showing distribution of the various kinds of coal and location of coal sections and coal samples described in bulletin 335 / by G.C. Martin ; assisted by A.G. Maddren ; Alfred H. Brooks, geologist in charge

Annotatie: Met profielen, tabel en lokatiekaartje; Annotatie geografische gegevens: Opname: 1905-1906

Martin, G. C.; Maddren, A. G.; Brooks, Alfred H.

1915

[Washington, D.C. : U.S. Geological Survey]

1:62 500

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