Pohl, W. L. (2011). Economic geology principles and practice: Metals, minerals, coal and hydrocarbons - Introduction to formation and sustainable exploitation of mineral deposits. Wiley-Blackwell.
Dyfyniad Arddull ChicagoPohl, Walter L. Economic Geology Principles and Practice: Metals, Minerals, Coal and Hydrocarbons - Introduction to Formation and Sustainable Exploitation of Mineral Deposits. Chichester: Wiley-Blackwell, 2011.
Dyfyniad MLAPohl, Walter L. Economic Geology Principles and Practice: Metals, Minerals, Coal and Hydrocarbons - Introduction to Formation and Sustainable Exploitation of Mineral Deposits. Wiley-Blackwell, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.