Ratheesh Kumar, C.S Triterpenoids as biomarkers of mangrove organic matter in cochin estuarine system (Thesis) Ratheesh, Kumar C.S; guided by N Chandramohanakumar - Kochi Faculty of Marine Sciences, CUSAT 2011 - 262p. Subjects--Index Terms: Mangrove Geochemistry-triterpenoids Universal Decimal Class. No.: 581.526.53 / RAT T