Tham khảo Tháp_đồng_hồ

  1. ↑ Joseph V. Noble; Derek J. de Solla Price: The Water Clock in the Tower of the Winds, American Journal of Archaeology, Vol. 72, No. 4 (1968), pp. 345-355 (353)
  2. 1 2 3 Clocks, Encyclopædia Britannica 5, 835 (1951).
  3. ↑ Frederick Tupper, Jr., 'Anglo-Saxon Dæg-Mæl', Publications of the Modern Language Association of America, Vol. 10, No. 2 (1895), p. 130, citing Archæologia, v, 416.
  4. ↑ “UK Parliament - Big Ben”. Truy cập ngày 27 tháng 10 năm 2009. 
  5. ↑ “Joseph Chamberlain Memorial Clock Tower”. Skyscraper News. Truy cập ngày 15 tháng 4 năm 2014. 
  6. ↑ "National Register of Historic Places Inventory - Nomination Form". (archive) National Park Service. page 10. Retrieved November 9, 2017. "The statue was … hoisted to the top of the tower in fourteen sections in 1894."
  7. ↑ ""History of City Hall: 1886-1890". (archive) Retrieved November 9, 2017. "1889: Mayor Fitler moves into completed offices on west side."
  8. ↑ "History of City Hall: 1891-1901". (archive) Retrieved November 9, 2017. "1891: State Supreme Court opens in permanent courtroom."