http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Generators and Relations in Groups and Geometries
Proceedings of the NATO Advanced Study Institute, Castelvecchio Pascoli, Lucca, Italy, April 1-14, 1990
edited by A. Barlotti, E.W. Ellers, P. Plaumann, K. Strambach.