I R Calder. (1998). Water - resource and land-use issues. Srilanka: IWMI(International Water Management Institute).
Chicago ZitierstilI R Calder. Water - Resource and Land-use Issues. Srilanka: IWMI(International Water Management Institute), 1998.
MLA ZitierstilI R Calder. Water - Resource and Land-use Issues. Srilanka: IWMI(International Water Management Institute), 1998.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.