Abstract
An investigation is made of fourteen space–times given by Dubourdieu which admit holonomy groups. It is shown that, although nine of these space–times admit only trivial vacuum gravitational fields, the remaining ones are of Bel–Petrov types III and N. Many of the latter metrics can be identified with known exact solutions of the source-free Einstein equations including the Kerr–Goldberg metric and certain type III metrics recently studied by the authors.
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