 NDL India: Biopetrological study of coals from ramagundam coalfield, godavari basin, Andhra Pradesh, IndiaBiopetrological study of coals from ramagundam coalfield, godavari basin, Andhra Pradesh, India Biopetrological study of coals from ramagundam coalfield, godavari basin, Andhra Pradesh, IndiaAuthor Sarate, Omprakash S. 