* Haywood, John. ''The Penguin Historical Atlas of the Vikings'' (1995) [http://www.amazon.com/Penguin-Historical-Atlas-Vikings-Hist/dp/0140513280/ref=pd_sim_dbs_b_2 excerpt and text search] | * Haywood, John. ''The Penguin Historical Atlas of the Vikings'' (1995) [http://www.amazon.com/Penguin-Historical-Atlas-Vikings-Hist/dp/0140513280/ref=pd_sim_dbs_b_2 excerpt and text search] |