http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
excursions for secondary teachers and students
ix, 254 σ. εικ. 26 εκ. 1 οπτικό δίσκο (4 3/4 in.)
System requirements for accompanying CD-ROM: Windows, Macintosh