?url_ver=Z39.88-2004&rft_id=10.1080%2F00139157.1987.9931356&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nilsson%2C+S.&rft.aulast=Nilsson&rft.aufirst=S.&rft.issue=9&rft.volume=29&rft.date=November+1987&rft.issn=0013-9157&rft.atitle=A+synthesis+of+survey+results%3A+The+Extent+of+Forest+Decline+in+Europe&rft.title=Environment%3A+Science+and+Policy+for+Sustainable+Development&rft.pages=4-31&rft.genre=article