A sample of ultra steep spectrum sources selected from the Westerbork In the Southern Hemisphere (WISH) surveyC. De Breuck, Y. Tang, A. G. de Bruyn, H. Röttgering and W. van BreugelA&A, 394 1 (2002) 59-69DOI: https://doi.org/10.1051/0004-6361:20021115
