NIST computer time services [electronic resource] : Internet Time Service (ITS), Automated Computer Time Service (ACTS), and time.gov web sites / Judah Levine, Michael A. Lombardi, Andrew N. Novick.
Imprint
[Boulder, Colo.] : U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology ; Washington, DC : For sale by the Supt. of Docs., U.S. G.P.O., [2002]