Zwammerdam 2

@article{bib_Weerd_1990_Barges,
author={de Weerd, Maarten Derk},
journal={Maritime Celts, Frisians and Saxons},
pages={75--76},
publisher={London: CBA RR},
title={Barges of the Zwammerdam type and their building procedures},
volume={71}
}

@article{bib_Weerd_2001_Romische,
author={de Weerd, Maarten Derk},
journal={Skyllis},
number={2},
pages={96--110},
title={Römische Schiffsfunde von Zwammerdam. Lehren aus einer alten Grabung},
volume={4}
}

@book{bib_Weerd_1978_Ships,
author={de Weerd, Maarten Derk},
title={Ships of the Roman period at Zwammerdam}
}