?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Hartmut&rft.au=+Walravens+Hartmut&rft.aulast=Walravens&rft.issn=0133-4239&rft.date=1997&rft.title=New+material+on+the+portraits+of+meritorious+officers+of+the+Qianlong+campaigns&rft.genre=bookitem