Media type: E-Article Title: Trends in occurrence of thermophilous dragonfly species in North Rhine-Westphalia (NRW) Contributor: Conze, Klaus-Jürgen; Grönhagen, Nina; Lohr, Mathias; Menke, Norbert Published: Pensoft Publishers, 2010 Published in: BioRisk, 5 (2010), Seite 31-45 Language: Not determined DOI: 10.3897/biorisk.5.841 ISSN: 1313-2652; 1313-2644 Keywords: Environmental Science (miscellaneous) Origination: Footnote: Access State: Open Access