http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 videodisc (51 min.) : sound, color ; 4 3/4 in.
Explains the formation of glaciers; discusses land features made by glacial flow, erosion, and deposition.
written, produced, and edited by Laurence Jankowski.