United Nations water conference - Summary and Main Documents.
Biswas, A.K.ed.\
United Nations water conference - Summary and Main Documents. - - Pergamon, Oxford, 1978 - v.2, p.xvii,217. - .
2
626/628 Bis
United Nations water conference - Summary and Main Documents. - - Pergamon, Oxford, 1978 - v.2, p.xvii,217. - .
2
626/628 Bis