Cite
MLA Citation
Unknown. IP multimedia subsystem (IMS) handbook. Boca Raton : CRC Press, 2009. http://access.bl.uk/ark:/81055/vdc_100045500809.0x000001
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Unknown. IP multimedia subsystem (IMS) handbook. Boca Raton : CRC Press, 2009. http://access.bl.uk/ark:/81055/vdc_100045500809.0x000001