Lahl U.: Controlling and eliminating ozone depleting compounds from the view of a municipal administration in the FRG. United Nations: The World Congress of Local Governments for a Sustainable Future, New York, 5.-8.9.1990
Lahl U.: Controlling and eliminating ozone depleting compounds from the view of a municipal administration in the FRG. United Nations: The World Congress of Local Governments for a Sustainable Future, New York, 5.-8.9.1990