Lahl U.: Chemiepolitik ist zuerst Produktpolitik. Die Zukunft der Chemie. In: Schaeffer R. (Hrsg.): Ist die technisch wissenschaftliche Zukunft demokratisch beherrschbar? Beiträge zum Kongress der Heinrich Böll Stiftung, 39-46, 1990

Lahl U., Zeschmar-Lahl B.: Isothiazolinone als Konservierungsmittel. Tenside Surf. Det. 27 (5), 316-317, 1990

Lahl U., Zeschmar-Lahl B.: Facette der Chlorchemie (I). Müllmagazin 3, 52-59, 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

Fabarius G., Wilken M., Borgas M., Zeschmar-Lahl B.: Release of organic pollutants during accidental fires. Lecture, DIOXIN’90, Bayreuth, and: Organohalogen Compounds 3, 373-376, 1990

Zeschmar-Lahl B., Wilken M., Jager J., Lahl U.: PCDD/PCDF balance of different municipal waste management methods. V. Comparison and results. Lecture, DIOXIN’90, Bayreuth, and: Organohalogen Compounds 4, 343-346, 1990

Borgas M., Wilken M., Zeschmar-Lahl B., Jager J.: PCDD/PCDF balance of different municipal waste management methods. IV. Recycling. Poster, DIOXIN’90, Bayreuth, and: Organohalogen Compounds 4, 339-342, 1990

Wilken M., Neugebauer F., Zeschmar-Lahl B., Jager J.: PCDD/PCDF balance of different municipal waste management methods. III. Composting. Poster, DIOXIN’90, Bayreuth, and: Organohalogen Compounds 4, 335-338, 1990

Mueller U., Hoer B., Zeschmar-Lahl B., Wilken M., Jager J.: PCDD/PCDF balance of different municipal waste management methods. II. Waste disposal and disposal gas incineration. Poster, DIOXIN’90, Bayreuth, and: Organohalogen Compounds 4, 331-334, 1990

Lahl U., Wilken M., Zeschmar-Lahl B., Jager J.: PCDD/PCDF balance of different municipal waste management methods. I. Municipal waste incinerators (MWI). Poster, DIOXIN’90, Bayreuth, and: Organohalogen Compounds 4, 327-330, 1990