NATURE AND RESOURCES - NEWSLETTER ABOUT SCIENTIFIC RESEARCH ON ENVIRONMENT, RESOURCES AND CONSERVATION OF NATURE - BULLETIN OF THE INTERNATIONAL HYDROLOGICAL DECADE.
Other titles: BULLETIN OF THE INTERNATIONAL HYDROLOGICAL DECADE - NATURE AND RESOURCES - NEWSLETTER ABOUT SCIENTIFIC RESEARCH ON ENVIRONMENT, RESOURCES AND CONSERVATION OF NATURE.; NATURE AND RESOURCES - INTERNATIONAL NEWS, AND INFORMATION ABOUT UNESCO PROGRAMMES CONCERNING ENVIRONMENTAL ... CONSERVATION.