REFERENCES
- Smith (HM). Greenwich Time and the Prime Meridian. Vistas in Astronomy. 20, 1976; 219.
- International Meridian Conference, Washington. Gibson Bros. Washington, USA, 1884.
- Conference International de 1'Heure. Bureau des Longitudes, Gauthier Villars, Paris 1912.
- Conference International de 1'Heure. Bureau des Longitudes, Gauthier Villars, Paris 1913.
- IAU Trans. VIII 223, 1922.
- Smith (H M). Determination of Time and Frequency. Proc. IEE. 98, 1951; 62.
- Smith (H M). Estimation of Absolute Frequency 1950–1951. Proc. EE. 99, IV 1952.
- Smith (H M) & Tucker (R H). MNRAS. 113, 1953; 251.
- Smith (H M). Le Service de signaux horaires de Greenwich. Ann. Fr. de Chron. 19, 1949; 227.
- Essen (L) & Parry (J V L). Atomic Standard of Frequency and Time Interval. Nature. 176, 1955; 280.
- Essen (L). Atomic Clocks. JIEE. 4, 1959; 647.
- Markowittz (W), Glenn Hall (R), Essen (L) & Parry (J V L). Frequency of Caesium in Terms of Ephemeris Time. Phys. Re v. Letters. 1, 1958.
- Smith (H M). Dissemination of Astronomical and Atomic Time. Nature. 221, 1969; 221.
- Penny (C J A). Greenwich Atomic Time Scale. CCDS/72, annex S.14, 1972.
- Smith (H M). International Time and Frequency Co-ordination. Proc. IEEE. 60. 1972; 479.