//-->
Schwache Konjunktur und milde Witterung drücken Primärenergieverbrauch
Wittke, Franz, (2003)
Foresight of Technological Determinants and Primary Energy Resources of Future Economic Long Waves
Coccia, Mario, (2015)
Konʹjunktura mirovogo rynka ėnergonositielej i tempy ėkonomičeskogo rosta v Rossii
Kazakova, Marija, (2009)
Principles of environmental science
Watt, Kenneth E. F., (1973)
Understanding the environment
Watt, Kenneth E. F., (1982)
Ecology and resource management : a quantitative approach
Watt, Kenneth E. F., (1968)