TY - RPRT TI - The Partition Intervalometer: A Programmable Underwater Timer for Marking Accumulated Sediment Profiles Collected in Anderson Sediment Traps: Development, Operation, Testing Procedures, and Field Results AU - Richard R. Rendigs AU - Roger Y. Anderson AU - Jingping Xu AU - Raymond E. Davis AU - Emile M. Bergeron PY - 2009 DO - 10.3133/ofr20091101 UR - https://pubs.usgs.gov/publication/ofr20091101 ID - ofr20091101 ER -