Complement to II/226
1 Meaning of Reference Block 0000000100000000011000
- Schroeder (1976A&AS...23..125S)
- Hall in Mathewson et al. (Cat. II/34)
(1958, Publ. U.S. Naval Obs. 2nd Ser. 17, VI)
- Behr in Mathewson et al. (Cat. II/34)
(1959, Veroeff. Univ. Sternw. Goettingen N.126)