TY  - BOOK
AU  - Bertell, Maths 
AU  -  Frog 
AU  -  Willson, Kendra
TI  - Contacts and Networks in the Baltic Sea Region: Austmarr as a northern mare nostrum, ca. 500-1500 AD
SN  - 9789048532674
PB  - Walter de Gruyter
KW  - History
UR  - http://www.degruyter.com/isbn/9789048532674
ER  -