TY - RPRT TI - Abstracts of the 11th Annual U.S. Geological Survey, Central Region, 1999 Poster Review; Collected Abstracts of Selected Poster Papers Presented at Scientific Meetings PY - 1999 DO - 10.3133/ofr99321 UR - https://pubs.usgs.gov/publication/ofr99321 ID - ofr99321 ER -