public function GetWorksheetEntry($location)
    {
        if ($location instanceof Zend_Gdata_Spreadsheets_DocumentQuery) {
            if ($location->getDocumentType() == null) {
                $location->setDocumentType('worksheets');
            }
            $uri = $location->getQueryUrl();
        } else {
            $uri = $location;
        }

        return parent::getEntry($uri, 'Zend_Gdata_Spreadsheets_WorksheetEntry');
    }