http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v.1. Organisms, energy and environment. - viii, 480 p. -- v.2. Systems, maintenance and change. - vi, 473-964 p.
N. P. O. Green, G. W. Stout, D. J. Taylor; editor R. Soper