Cite

Silesia Ducatus A. Martino Helwigio ...

MLA

Silesia Ducatus A. Martino Helwigio ... 0AD. https://collections.library.yale.edu/catalog/15483002.

APA, 6th edition

Silesia Ducatus A. Martino Helwigio ... (0 C.E.). [Maps]. https://collections.library.yale.edu/catalog/15483002.