DIN ETS 300523:1995-09 European digital cellular telecommunications system (Phase 2) - Numbering, addressing and identification; English version ETS 300523:1995
1995DIN ETS 300523:1995-09 European digital cellular telecommunications system (Phase 2) - Numbering, addressing and identification; English version ETS 300523:1995
1995DIN ETS 300523:1995 European digital cellular telecommunications system (Phase 2) - Numbering, addressing and identification; English version ETS 300523:1995