00402nam a2200133Ia 4500020001500000082002600015100003100041245010700072260003300179300000900212500003700221500000500258700000500263  a0821356712  aCD122b384.64 W927.MC  aUm, Paul Noumba and others  aA model for calculating interconnection costs in telecommunicationsbcEd. by Paul Noumba Um ...et.al.  aWashingtonbWorld Bankc2004  a1 CD  a"Received with the Book" DP26932  a  a