http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
In addition to providing details on the tunnels, the author explores the reasons they were created, their engineers and their use, the book includes more than fifty period and contemporary photos of the tunnels. A glossary explains unfamiliar concepts related to railroad construction and maintenance.
Includes bibliographical references and index.