Institute for Scientific Co-operation, Federal Institute for Geosciences and Natural Resources. (1991). Natural resources and development: A biannual collection of recent German contributions concerning the exploration and exploitation of natural resources (Vol.34.). Institute for scientific Co-operation.
Чикаго маягийн жагсаалтInstitute for Scientific Co-operation, Federal Institute for Geosciences and Natural Resources. Natural Resources and Development: A Biannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. Vol.34. Tϋbingen: Institute for scientific Co-operation, 1991.
MLA ишлэлInstitute for Scientific Co-operation, Federal Institute for Geosciences and Natural Resources. Natural Resources and Development: A Biannual Collection of Recent German Contributions Concerning the Exploration and Exploitation of Natural Resources. Vol.34. Institute for scientific Co-operation, 1991.