Report on the 1975 survey of users of the services of radio stations WWV and WWVH / J. A. Barnes, R. E. Beehler; Time and Frequency Division, Institute for Basic Standards.
出版资料
Washington : U.S. Dept. of Commerce, National Bureau of Standards: for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1975.
