http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"National cooperative dairy herd improvement program."
Description based on: Volume 55, number 1 (June 1979).
Vols. for <1986- > distributed to depository libraries in microfiche.
Vol. 33, no. 1-7 issued as ARS-52; v. 33, no. 8-v. 48, no. 3 issued as ARS-44; v. 48, no. 4-v. 54, no. 2 as ARS-NE-1, etc.
Vols. for 1957-1971 issued by the Agricultural Research Service; Jan.-Apr./May 1972 by the Service's Animal Science Research Division; June/July 1972, <Nov. 1982- > by its Northeastern Region; 197 -<July 1981> by the Agricultural Research (Northeastern Region), Science and Education Administration.
Dairy-herd-improvement-association letter
Agricultural Research Service (Northeastern Region), Science and Education Administration, U.S. Dept. of Agriculture, Beltsville, Md., 20705