The following source files are taken from the HDF-EOS package

EHapi.c,
GDapi.c,
SWapi.c,
HDFEOSVersion.h,
HdfEosDef.h,
ease.h

and have the following copyright notice:

Copyright (C) 1996 Hughes and Applied Research Corporation

Permission to use, modify, and distribute this software and its documentation 
for any purpose without fee is hereby granted, provided that the above 
copyright notice appear in all copies and that both that copyright notice and 
this permission notice appear in supporting documentation.