Proceedings of the First International Symposium on Wood Tar and Pitch : held by Biskupin Museum (department of the State Archaeological Museum in Warsaw) and the Museumsdorf Düppel (Berlin) at Biskupin Museum, Poland, July 1st-4th 1993 / ed. by Wojciech Brzeziński, Wojciech Piotrowski. (State Archaeological Museum ; Museumsdorf Düppel, 1997)