Chaoudhru, R.N. creator Singh, S.P. text xu| New Delhi Orient 2005 3rd ed. monographic ng 1600p. by R.N. Chaoudhry and S.P. Singh Telephone - Law and legislation - India Telecom Regulatory Authority of India (TRAI) Telecommunication - Law and legislation - India W7x54 C458/2005 8187197188 180718