1. E. Sezgin and P. van Nieuwenhuizen, Stonybrook preprint ITP-SB-80-3 (revised version);
2. this paper employs the correct ghost assignments given by W. Siegel, Institute for Advanced Study preprint;
3. see also J. Thierry-Mieg, Harvard preprint.
4. P.K. Townsend, CERN preprint TG.2790.
5. New gravitational index theorems and super theorems