http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
the eighteenth decennial census of the United States
v. 1. Characteristics of the population. pt. A and numb. pts. in -- v. 2. Subject reports. pts.-- v. 3. Selected area reports. pts.
[U.S. Department of Commerce, Bureau of the Census]
Volumes 2-3 issued as Final reports PC(2)-(3)