1. Supplement of the Catalogue of Polar Aurorae < 55° N in the period 1000 - 1900 Creator: Křivský, Ladislav Format: bez média and svazek Type: model:article and TEXT Subject: observations and north polar aurorae Language: Czech Description: The supplement contains corrections and new data of the past observation of north polar aurorae (< 55° N). and Reprinted from Travaux Géophysiques XXXVII 1993-1996 Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public