Investigations into amber : proceedings of the international interdisciplinary sympozium : Baltic amber and other fossil resins 997 Urbs Gyddanyzc - 1997 Gdańsk, 2-6 September 1997, Gdańsk / ed. by Barbara Kosmowska-Ceranowicz & Henryk Paner. (The Archaeological Museum : Museum of the Earth, Polish Academy of Sciences, 1999)