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This paper presents 2112 new 21-cm neutral hydrogen line measurements carried out with the meridian transit Nançay radiotelescope. Among these data we give also 213 new radial velocities which complement those listed in three previous papers of this series. These new measurements, together with the HI data collected in LEDA, put to 6 700 the number of galaxies with 21-cm line width, radial velocity, and apparent diameter in the so-called KLUN sample.
Theureau et al. (Mon,) studied this question.