Complement to II/226
1 Meaning of Reference Block 0000000000000000010011
- Hall in Mathewson et al. (Cat. II/34)
(1958, Publ. U.S. Naval Obs. 2nd Ser. 17, VI)
- Appenzeller (1966ZA.....64..269A) in Mathewson et al. (Cat. II/34)
- Mathewson et al. (Cat. II/34), excluding references
Appenzeller, Behr, Hall, Hiltner, Klare/Neckel, Krautter, Mathewson/Ford, Schmidt, van Smith