Bibtex export
@article{ Weidner1987, title = {Clean air: how the nations stand}, author = {Weidner, Helmut}, journal = {Acid news: a newsletter on air pollution and climate change}, number = {3}, pages = {8-10}, year = {1987}, issn = {0281-5087}, keywords = {Luft; air; Umweltverschmutzung; environmental pollution; Luftreinhaltung; air pollution control; internationaler Vergleich; international comparison; Europa; Europe; Umweltpolitik; environmental policy}}