Gaya APA

Natural resources and development, A Biannual collection of recent German contributions concerning the exploration and exploitation of natural resources. (1999). : Tubingen, Institute for Scientific Co-operation.

Gaya MLA

Natural resources and development, A Biannual collection of recent German contributions concerning the exploration and exploitation of natural resources. Vol. 51. : Tubingen, Institute for Scientific Co-operation, 1999. Text.