Source of PM5544

[[Image/TestCard]] [[Philips]]

- https://en.wikipedia.org/wiki/Philips_PM5544

- 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