Furuta, Toshio; Arai, Fusao (1980): Petrographic and geochemical properties of tephras in Deep Sea Drilling Project cores from the North Philippine Sea. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Klein, George de Vries, Kobayashi, Kazuo, Chamley, Herve, Curtis, Doris, Dick, Henry, Echols, Dorothy Jung, Fountain, David M., Kinoshita, Hajimu, Marsh, Nicholas G., Mizuno, Atsuyuki, Nisterenko, Gennady V., Okada, Hisatake, Sloan, Jon R., Waples, Douglas, White, Stan M., Stout, Larry N. (editor), Leg 58 of the cruises of the drilling vessel Glomar Challenger; Yokahama, Japan to Okinawa, Japan; December, 1977-January, 1978, 58, 617-627, georefid:1981-011416