”III Session of October 6, 1884 (Janssenin puheenvuoro) Julkaisija = Protocols of the Proceedings”, International Conference held at Washington for the purpose of fixing a Prime Meridian and a Universal Day, s. 44–45, 56–57. Washington, D. C.. Määritä julkaisija!Teoksen verkkoversio.
”III Session of October 6, 1884 (Stracheyn puheenvuoro)”, International Conference held at Washington for the purpose of fixing a Prime Meridian and a Universal Day, s. 92. Washington, D. C.: Protocols of the Proceedings, 1884. Teoksen verkkoversio.
