SIMBAD references

We present new observations of the ¹²CO(1-0) line in 34 spiral galaxies, 24 in the Virgo cluster, 9 in the Coma supercluster region and one in Abell 2197. The observations have been made at the SEST 15 m and the Onsala 20 m telescopes. 21 of the observed galaxies were detected. For galaxies in common with other surveys we have 3 new detections, 2 improved upper limits and 4 confirmed detections. Since the galaxies have been observed at the central position only, the CO data are used to determine a lower limit to the H₂ content. The analysis of these data is presented in Boselli (1994).