Dowsett, Harry J.; West, Stephanie M. (1992): Pliocene planktic foraminifer census data from Deep Sea Drilling Project Hole 607 and Ocean Drilling Program Hole 661A. U. S. Geological Survey, Reston, VA, United States, Open-File Report - U. S. Geological Survey, OF 92-0413, 4 pp., georefid:1993-000269