Whitey - 10:01 pm on Aug 6, 2008 (gmt 0)

This was what I was looking for : [scholar.google.com...]

Google will continue to exclude your site or directories from successive crawls if the robots.txt file exists in the web server root. If you do not have access to the root level of your server, you may place a robots.txt file at the same level as the files you want to remove. Doing this and submitting via the automatic URL removal system will cause a temporary, 180 day removal of your site from the Google index, regardless of whether you remove the robots.txt file after processing your request. (Keeping the robots.txt file at the same level would require you to return to the URL removal system every 180 days to reissue the removal.)