Submerged repeater amplifier, 1967
1967
1967
1965
1965
circa 1964
1965
1965
(1962); 1982
2000-100 BCE
1967
1964
1965
1964
1964
1964
circa 1965
1965
1966
1965
1964-1966
1903 (original); 1982 (model)
1965
1966
1965
1990-96
1967
1966
1967
1830 (original); 1967 (model)
1966
1964
1966
1967
4000-2001 BCE
1966
1965
1965
1966
1966
1965
1965
1964
1970-1900
1966
10000-5000 BCE
1967
1965
1965
circa 1965
1966
1965