Carbon isotope composition in microbial mats and travertine of BRZ Lazareva, E. V. ; Bryanskaya, A. V. ; Zhmodik, S. M. ; Ponomarchuk, V. A. ; Barkhutova, D. D. ; Semionova, D. V. Abstract Publication: Geochimica et Cosmochimica Acta Supplement Pub Date: July 2008 Bibcode: 2008GeCAS..72R.521L