TY - RPRT TI - Accreting Gas and Dust in Pre-Main Sequence Disk Systems AU - Sitko, M. L. AU - Grady, C. A. AU - Lynch, D. K. AU - Russell, R. W. AU - Hanner, M. S. PY - 1999 UR - https://ntrs.nasa.gov/citations/19990064607 ID - 19990064607 ER -