...surveys

Tables 1, 2, 3 also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

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...Nançay

The Nançay Radioastronomy Station is part of the Paris Observatory and is operated by the Ministère de l'Éducation Nationale and Institut des Sciences de l'Univers of the Centre National de la Recherche Scientifique.

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...Bank

The Green Bank Observatory is part of the National Radio Astronomy Observatory, which is operated by Associated Universities, Inc. for the National Science Foundation.

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