Détail du congrès:
Congrès: Proceedings of the fifth national symposium on individual and small community sewage systems, Chicago, Illinois, 14-15th december 1987 (1987; USA) (1987) |
Congrès: Proceedings of the fifth national symposium on individual and small community sewage systems, Chicago, Illinois, 14-15th december 1987 (1987; USA) (1987) |