ETSI PRETS 300 133-4-1997 Elecrtomagnetic Compatibility and Radio Spectrum Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 4: Air Interface Specification Second Edition
1997ETSI ETS 300 133-4-1997 Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 4: Air Interface Specification (Second Edition)
1996ETSI PRETS 300 133-4-1996 Radio Equipment and Systems (RES); European Radio MEssage System (ERMES); Part 4: Air Interface Specification Second Edition
ETSI PRETS 300 133-4-1997 Elecrtomagnetic Compatibility and Radio Spectrum Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 4: Air Interface Specification Second Edition was changed to ETSI ETS 300 133-4-1997 Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Enhanced Radio MEssage System (ERMES); Part 4: Air Interface Specification (Second Edition).