Determining the Economic Value of Water - Young, Robert A. (Colorado State University, USA) a Loomis, John B. (Colorado State University, USA)2 531 Kč
Petroleum Company Operations and Agreements in the Developing Countries - Mikesell, Raymond F.3 250 Kč
Development of European Gas Markets - Estrada, Javier (Fridtjof Nansen Institute, Norway) a Moe, Arild (Fridtjof Nansen Institute, Norway) a Martinsen, Kare Dahl (Fridtjof Nansen Institute, Norway)8 697 Kč