http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Characteristics of public and private elementary and secondary school teachers in the United States
results from the 2011-12 Schools and Staffing Survey
National Center for Education Statistics
Rebecca Goldring, Lucinda Gray, Amy Bitterman, [and] Stephen Brougham.