Cite
MLA Citation
Unknown. Asterisk 1.6 : build feature-rich telephony systems with Asterisk. Birmingham : Packt Publishing, 2009. http://access.bl.uk/ark:/81055/vdc_100035548169.0x000001
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Unknown. Asterisk 1.6 : build feature-rich telephony systems with Asterisk. Birmingham : Packt Publishing, 2009. http://access.bl.uk/ark:/81055/vdc_100035548169.0x000001