@phdthesis{Widodo2008,
  author      = {Sri Widodo},
  title       = {Organic petrology and geochemistry of Miocene coals from Kutai Basin, Mahakam Delta, East Kalimantan, Indonesia : genesis of coal and depositional environment},
  type        = {doctoralthesis},
  pages       = {187},
  school      = {Universit{\"a}tsbibliothek Johann Christian Senckenberg},
  year        = {2008},
}