TY - RPRT TI - The role of SO2 in volcanism on Io AU - B.A. Smith AU - E.M. Shoemaker AU - S. W. Kieffer AU - A.F. Cook PY - 1979 DO - 10.1038/280738a0 UR - https://pubs.usgs.gov/publication/70012529 ID - 70012529 ER -