Geology of the Platteville quadrangle, Wisconsin /

Autor Agnew, Allen F.
Vydáno 1963

Stratigraphy of Middle Ordovician rocks in the zino-load district of Wisconsin, IIIinois, and Iowa /

Autor Agnew, Allen F., Heyl, Allen V. 1918-2008, Behre, C. H., Lyons, E. J.
Vydáno 1956

The geology of the upper Mississippi Valley zinc-lead district /

Autor Heyl, Allen V. 1918-2008, Agnew, Allen F., Lyons, Erwin J., Behre, Charles H., Flint, Arthur E., 1913-
Vydáno 1959