1. a The National Agency for the Protection of Nature, Monuments and Sites , Fredningsstyrelsen, Amaliegade 13, DK-1256 , Copenhagen K
2. b Institute of Prehistoric Archaeology, University of Copenhagen , Vandkunsten 5, DK-1467 , Copenhagen K
3. c The National Museum, Dept. of Natural Science , Ny Vestergade 11, DK-1471 , Copenhagen K