The NRAO 43-m telescope has been used to obtain H I 21-cm fluxes of a large number of irregular galaxies integrated over a 21arcmin beam which can be used for determining total gas masses of these systems. The data are compared with fluxes obtained by Fisher and Tully (1975, 1981) with a 10arcmin beam to identify those galaxies which may have extended H I distributions relative to the optical sizes. Seven good candidate systems are listed. The presence of extended H I in irregular galaxies does not seem to correlate with basic global galaxian properties.
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Deidre A. Hunter (1985) studied this question.