page states "This image is freely available and may be used without special permission. "
Licensing
Public domainPublic domainfalsefalse
This work has been released into the public domain by its author, Dr. Erwin Huebner. This applies worldwide. In some countries this may not be legally possible; if so: Dr. Erwin Huebner grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.