http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Preparation of polyethylene sacks for collection of precipitation samples for chemical analysis
by LeRoy J. Schroder and Amy W. Bricker.
Includes bibliographical references (pages 8-9).
Water-resources investigations report ; 85-4067