code: def getSearchUrl(self, album, artist):
      
      params = collections.OrderedDict()
      params["search-alias"] = "popular"
      params["field-artist"] = artist
      params["field-title"] = album
      params["sort"] = "relevancerank"
      return __class__.assembleUrl(self.base_url, params)
docs: See CoverSource.getSearchUrl.