United Nations Water congerence conf. on alternative strategies for desertdevelopment , management.
Unitecd Nations
United Nations Water congerence conf. on alternative strategies for desertdevelopment , management. - USA Abstracts Papers , Conf.Papers California 1977
Desert,Arid,Semi Arid Desert Development
574.52652
United Nations Water congerence conf. on alternative strategies for desertdevelopment , management. - USA Abstracts Papers , Conf.Papers California 1977
Desert,Arid,Semi Arid Desert Development
574.52652