Cite
MLA Citation
British Standards Institution,. PNO-ISC specification number 007. ISDN user part (ISUP). London : British Standards Institution, 1998. 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.
British Standards Institution,. PNO-ISC specification number 007. ISDN user part (ISUP). London : British Standards Institution, 1998. http://access.bl.uk/ark:/81055/vdc_100104842923.0x000001