http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Preliminary map showing global distribution of alpine-type ultramafic rocks and blueschists
Global distribution alpine-type ultramafic rocs and blueschists, preliminary map
by William P. Irwin, and Robert G. Coleman.
Miscellaneous field studies ; map MF-340