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↑ Hohenkerk, C.Y., Yallop, B.D., Smith, C.A., & Sinclair, A.T. "Celestial Reference Systems" in Seidelmann, P.K. (ed.) Explanatory Supplement to the Astronomical Almanac . Sausalito: University Science Books. p. 99.
↑ van Leeuwen, F. (????)? "HIP 11767" ? Hipparcos, the New Reduction ? ???????? ????? ????-??-?? ?

[1] Hohenkerk, C.Y., Yallop, B.D., Smith, C.A., & Sinclair, A.T. "Celestial Reference Systems" in Seidelmann, P.K. (ed.) Explanatory Supplement to the Astronomical Almanac . Sausalito: University Science Books. p. 99.

[hipparcos-2] van Leeuwen, F. (????)? "HIP 11767" ? Hipparcos, the New Reduction ? ???????? ????? ????-??-?? ?

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