[[Image/DataSet]] - The birth of the test card -- https://web.archive.org/web/20160304132214/http://www.pembers.freeserve.co.uk/Test-Cards/index.html#Birth - Test Card 'G' and PM5544 -- https://web.archive.org/web/20160406081058/http://www.pembers.freeserve.co.uk:80/Test-Cards/Test-Card-Technical.html#PM5544 |