Here are some example spectra illustrating a range of redshifts and magnitudes taken during one of the earliest observing runs. Data quality has improved very significantly since these data were obtained.
They are available as a postscript file as well.
They were also used to produce the restframe plot which shows how these spectra might appear if they were in the local near-by Universe.
This site is kindly hosted by
Astrophysics Research Institute of Liverpool JMU.