The Bolivian Source Rocks. Sub Andean Zone. Madre de Dios. Chaco E. Diaz Martinez, I. Moretti, G. Montemurro, M. Perez and E. Aguilera Rev. Inst. Fr. Pét., 50 6 (1995) 753-777 Published online: 01 November 2006 DOI: 10.2516/ogst:1995045