?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Allen%2C+S+J&rft.aufirst=S+J&rft.aulast=Allen&rft.issn=1097-0088&rft.pages=625-636&rft.atitle=Measurements+of+albedo+variation+over+natural+vegetation+in+the+sahel&rft.volume=14&rft.issue=6&rft.title=International+Journal+of+Climatology&rft.date=1994&rft.genre=article