Two works by M. Gumowski published as part of volume III of "Historja Śląska" of 1936.
Silesian seals to the end of the 14th century; pp.247-440 + 43 tables (pp.85-127)
Coinage in Silesia to the end of the 14th century; pp.553-717 + 19 tables (pp.145-163)
- published 1936, Cracow
- 886 pages
- format 17 x 23 cm