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DIN ETS 300125
Integrated Services Digital Network (ISDN); user-network interface data link layer specification; application of CCITT recommendations Q.920/I.440 and Q.921/I.441; english version ETS 300125:1991
Edition
1992-05
DIN CEN/TS 16614-4
Public transport - Network and Timetable Exchange (NeTEx) - Part 4: Passenger Information European Profile; English version CEN/TS 16614-4:2020
Edition
2020-07
