Bannert, D., & Ernst, W. (1992). Natural resources and development. Vol. 35. A biannual collection of recent German contributions concerning the exploration and exploitation of natural resources. Institute for Scientific Co-Operation.
Citace podle Chicago (17th ed.)Bannert, Dietrich, a W. Ernst. Natural Resources and Development. Vol. 35. A Biannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. Tübingen: Institute for Scientific Co-Operation, 1992.
Citace podle MLA (9th ed.)Bannert, Dietrich, a W. Ernst. Natural Resources and Development. Vol. 35. A Biannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. Institute for Scientific Co-Operation, 1992.