Fundamental plane distances to early-type field galaxies in the South Equatorial Strip - I. The spectroscopic dataK. R. Müller, G. Wegner, S. Raychaudhury and W. FreudlingAstron. Astrophys. Suppl. Ser., 140 3 (1999) 327-344DOI: https://doi.org/10.1051/aas:1999522