(GTR) Proefschriften (vorm); (BTR) geldverkeer; (BTR)
a treatise on the history of the systems of money of account in
Noord-Nederland; (GTR) West-Nederland; (GTR) Ostfriesland;
in medieval Frisia : a treatise on the history of the systems
of money of account in the former Frisia (c.600-c.1500) / Dirk
(GTR) Geld; (GTR) Economische waarde; (GTR)
The evolution of the money standard in medieval Frisia :
Middeleeuwen; (BTR) Friesland ; geschiedenis [NCC]