http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v. 1. Wells, fences, and railings -- 2. Roads, paving, and drainage -- v. 3. Earth and water retaining structures -- v. 4. Materials, steps, ramps, and light structures.
Volumes 3-4 published: Aldershot ; Brookfield, USA : Ashgate.
Includes bibliographical references and index.