?url_ver=Z39.88-2004&rft_id=10.1080%2F00139157.1987.9928884&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Clark%2C+W.&rft.aulast=Clark&rft.aufirst=W.&rft.issue=5&rft.volume=29&rft.date=1987&rft.issn=0013-9157&rft.atitle=Editorial%3A+National+Security+and+the+Environment&rft.title=Environment%3A+Science+and+Policy+for+Sustainable+Development&rft.pages=i&rft.genre=article