Böckh, E. (1983). Natural resources and development. Vol.17. A binannual collection of recent German contributions concerning the exploration and exploitation of natural resources. Institute for Scientific Co-Operation.
Citace podle Chicago (17th ed.)Böckh, Eduard. Natural Resources and Development. Vol.17. A Binannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. Tübingen: Institute for Scientific Co-Operation, 1983.
Citace podle MLA (9th ed.)Böckh, Eduard. Natural Resources and Development. Vol.17. A Binannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. Institute for Scientific Co-Operation, 1983.
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