INTERNATIONAL conference (1969: Paris)
INTERNATIONAL conference on the practical and scientific results of the International Hydrological decade and on international co-operation in hydrology /Organised by UNESCO,Paris, 8-16 December 1969 - Paris UNESCO 1970 - 70 p.
83629
551.49 / INT
INTERNATIONAL conference on the practical and scientific results of the International Hydrological decade and on international co-operation in hydrology /Organised by UNESCO,Paris, 8-16 December 1969 - Paris UNESCO 1970 - 70 p.
83629
551.49 / INT