Gupta, Anil K; Thomas, Ellen (1999): Latest Miocene-Pleistocene Productivity and Deep-Sea Ventilation in the Northwestern Indian Ocean (Deep Sea Drilling Project Site 219). Paleoceanography, 14(1), 62-73, doi:10.1029/1998PA900006
DSDP Site 219 Miocene -Recent foraminifera data (URI: https://www.ncdc.noaa.gov/paleo/study/2612)