On the original Orbit of comet 1899 I.

Ngā tūemi rite

• On the original Orbits of comets 1925 I, 1902 III and 1897 I
  mā: Rasmusen, Hans Q.
  I whakaputaina: (1938)
• The Orbit of comet 1929 I (Schwassmann-Wachmann) in the years 1920-1936.
  mā: Rasmusen, Hans Q.
  I whakaputaina: (1935)
• The original Orbit of comet 1904 I (Brooks).
  mā: Sinding, Erik
  I whakaputaina: (1935)
• On the original Orbits of comets 1925 I, 1902 III and 1897 I.
  mā: Strömgren, Elis
  I whakaputaina: (1938)
• The Comets and their origin.
  mā: Lyttleton, R. A.
  I whakaputaina: (1953)