http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
The middle silurian Rocks of North Wales
Erdwiss. FU -- BOSWELL, P[ercy] G[eorge] H [mnall] : -- The middle silurian Rocks of North Wales. - London: -- Arnold(1949).XV,448 S.m.Abb. 8°