@incollection{GruenewaldHartmann2020,
  author    = {Martin Gr{\"u}newald and Sonngard Hartmann},
  title     = {Glass workshops in northern Gaul and the Rhineland in the first millennium AD as hints of a changing land use: including some results of the chemical analyses of glass from Mayen},
  booktitle = {Neighbours and successors of Rome: traditions of glass production and use in Europe and the middle east in the later 1st millennium AD: Papers presented at a conference organized by the Association for the History of Glass, held at King's Manor, York, 19 - 20 May, 2011},
  editor    = {Daniel Keller and Jennifer Price and Caroline Jackson},
  isbn      = {978-1-78297-397-3},
  year      = {2020},
}