Ganga Air microbiology 1 Gandhian philosophy 1 Himalayan rivers 1 Indus 1 Industrial waste water treatment 1 Mahanadhi 1 Monsoon rivers 1 Narmada 1 Petroleum genesis 1 Phytoplankton, ecology 1 Plankton ecology 1 Pond ecology 1 River linking 1 Sacred Rivers 1 Saline rivers western India 1 Sewage treatment 1 Soil microbiology 1 Tapi 1 Waste water microbiology 1 Water quality 1 Yamuna 1 rivers 1