Cite
APA Citation
Institution,, B. S. (1998). PNO-ISC specification number 007. ISDN user part (ISUP). London : British Standards Institution. http://access.bl.uk/ark:/81055/vdc_100104842923.0x000001
This is an interim version of our Electronic Legal Deposit Catalogue-eJournals and eBooks while we continue to recover from a cyber-attack.
Institution,, B. S. (1998). PNO-ISC specification number 007. ISDN user part (ISUP). London : British Standards Institution. http://access.bl.uk/ark:/81055/vdc_100104842923.0x000001