International conference on mineral and energy resources management (2003 : Yogyakarta). (2003). International conference on mineral and energy resources management, Yogyakarta July 28-31, 2003 : program book. Yogyakarta :: Universitas Pembangunan Nasional "Veteran" Yogyakarta,.
International conference on mineral and energy resources management (2003 : Yogyakarta). International conference on mineral and energy resources management, Yogyakarta July 28-31, 2003 : program book. Yogyakarta :: Universitas Pembangunan Nasional "Veteran" Yogyakarta,, 2003
International conference on mineral and energy resources management (2003 : Yogyakarta). International conference on mineral and energy resources management, Yogyakarta July 28-31, 2003 : program book. Yogyakarta :: Universitas Pembangunan Nasional "Veteran" Yogyakarta,, 2003.