HT: Harker & Tuttle (1956), G: Greenwood (1967), ZJ: Ziegenbein & Johannes (1974), Ziegenbein & Johannes (1982), HSN: Haselton et al. (1978), JK: Jacobs & Kerrick (1981)

Postscriptfile: cms-13a.ps, cms-13b.ps

last modified: 8.8.1997 by Matthias Gottschalk