Wellmer,Friedrich-Wilhelm. (1989). Economic evaluations in exploration. Springer - Verlag.
シカゴスタイル引用形Wellmer,Friedrich-Wilhelm. Economic Evaluations in Exploration. London: Springer - Verlag, 1989.
MLA引用形式Wellmer,Friedrich-Wilhelm. Economic Evaluations in Exploration. Springer - Verlag, 1989.
警告: この引用は必ずしも正確ではありません.