http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
viii, 149 pages : 3 charts, 1 map ; 22 cm.
"... originally published in the United States of America in 1983 by the National Academy Press, Washington, D.C., as Report Number 20 of the Committee on Population and Demography."
Report (National Research Council (U.S.). Committee on Population and Demography) ; no. 20