@article{van der Steen_2009, title={Sjaak van der Velden, Van SDB to SP. 125 jaar socialisme in Nederland}, volume={6}, url={https://tseg.nl/article/view/7719}, DOI={10.18352/tseg.449}, number={2}, journal={TSEG - The Low Countries Journal of Social and Economic History}, author={van der Steen, Bart}, year={2009}, month={Jun.}, pages={117–118} }