アストロノミシェ・ナハリヒテン
7 (1895)
↑ Priestley and Weale (1851). “Heinrich Christian Schumacher”. Monthly Notices of the Royal Astronomical Society: p.78.. http://articles.adsabs.harvard.edu//full/seri/MNRAS/0011//0000078.000.html?high=47092a25b430069.
↑ シューマッハは1845年のジョージ・ビドル・エアリーへの手紙の中で「1年に1500通の手紙」と書いた。また、[[]] Schumacher wrote of "1500 letters a year" in a letter to George Biddell Airy in 1845, and the Berlin State Library has nearly 10,000 letters to Schumacher from 750 authors (Hamel, 2001).
↑ "All astronomers of any importance published in this journal whether they came from Germany, France, England, Russia, Italy, the Netherlands, the United States, Denmark..." (Hamel, 2001)