Anne, I., & Ernst, W. (1991). Natural resources and development. Vol. 33. A biannual collection of recent German contributions concerning the exploration and exploitation of natural resources ([1st ed.].). Institute for Scientific Co-Operation.
Chicago-Zitierstil (17. Ausg.)Anne, Ibrahime, und W. Ernst. Natural Resources and Development. Vol. 33. A Biannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. [1st ed.]. Tübingen: Institute for Scientific Co-Operation, 1991.
MLA-Zitierstil (9. Ausg.)Anne, Ibrahime, und W. Ernst. Natural Resources and Development. Vol. 33. A Biannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. [1st ed.]. Institute for Scientific Co-Operation, 1991.