International Coal Preparation Congress Cracow, Poland. (1996). New trends in coal preparation technologies and equipment: Proceedings of the 12th international coal preparation congress; Cracow, Poland, May 23-27, 1994. Gordon & Breach.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Coal Preparation Congress Cracow, Poland. New Trends in Coal Preparation Technologies and Equipment: Proceedings of the 12th International Coal Preparation Congress; Cracow, Poland, May 23-27, 1994. Australia: Gordon & Breach, 1996.
Παραπομπή σε μορφή MLA (9th εκδ.)International Coal Preparation Congress Cracow, Poland. New Trends in Coal Preparation Technologies and Equipment: Proceedings of the 12th International Coal Preparation Congress; Cracow, Poland, May 23-27, 1994. Gordon & Breach, 1996.