As part of Numismatic News 1993 No. 3-4 two articles on the subject of Silesian quartos:
- Krystyna Kamocka titled. "Silesian quartos in the collection of the National Museum in Wroclaw"; pp.183-192
- Kazimierz Drożdż entitled. "A private collection of Silesian quartos"; pp.193-196
- edition 1993, Warsaw
- pages 212; pages 175-196 loose
- format: 16.5 x 24 cm
- soft cover, cardboard