Polish publications
Pietroń Barbara - Coins and medals from the collection of Stanislaw Niewitecki in the collection of the L. Wyczółkowski Regional Museum in Bydgoszcz, Bydgoszcz 1999, ISBN 8386580216
66 pages of approx. A4 format, cardboard binding, interesting catalog of Stanislaw Niewitecki's collection, which was gradually bought out by the District Museum in Bydgoszcz