This is the fourth day discourse on Virataparvam by Garikapati Narasimharao garu at Undrajavaram. Mahabharatam pravachanam by eminent speakers is planned for 66 days from Feb 29th to June 23rd (2012) at Undrajavaram. Here is the link to the audio files on Virataparvam.
http://www.pravachanam.com/browse/telugu/undrajavaram_mahabharatam/garikapati_narasimha_rao/04_virata_parvam_at_undrajavaram