[1] [MS-WMF]: Windows Metafile Format ( (2014-04-12 14:59:09 +09:00 版)) http://msdn.microsoft.com/en-us/library/cc250370.aspx

[2] RFC 7903 - Windows Image Media Types (2016-10-02 22:24:12 +09:00) https://tools.ietf.org/html/rfc7903