Complement to II/226
1 Meaning of Reference Block 0000000000000000011100
- 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)
- Appenzeller (1968ApJ...151..907A) in Mathewson et al. (Cat. II/34)