Biass, Sébastien A quantitative uncertainty assessment of eruptive parameters derived from tephra deposits: the example of two large eruptions of Cotopaxi volcano, Ecuador - Berlin Springer January 2011 - pp. 73-90 ilus. Subjects--Topical Terms: ERUPCIONES EXPLOSIVASERUPCIONES VOLCANICASTEFRAVOLCANESVOLCANISMO Subjects--Geographic Terms: ANDESCOTOPAXI, VOLCANECUADOR