Frederiksen, H. D. (1992). Drought planning and water efficiency implications in water resources management. World bank.
Chicago ZitierstilFrederiksen, Harald D. Drought Planning and Water Efficiency Implications in Water Resources Management. USA: World bank, 1992.
MLA ZitierstilFrederiksen, Harald D. Drought Planning and Water Efficiency Implications in Water Resources Management. World bank, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.