http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Coresident grandparents and grandchildren
Also available via Internet from the Census Bureau web site. Address as of 8/17/99: http://www.census.gov/prod/99pubs/p23-198.pdf; current access is available via PURL.