Schmincke, Hans-Ulrich (1982): Ash from vitric muds in deep sea cores from the Mariana Trough and fore-arc region (South Philippine Sea) (Sites 453,454, 455, 458, 459, and SP), Deep Sea Drilling Project Leg 60. Texas A & M University, Ocean Drilling Program, College Station, TX, United States, In: Lee, Marianna (editor), Powell, Robert (editor), Hussong, Donald M., Uyeda, Seiya, Blanchet, Rene, Bleil, Ulrich, Ellis, C. Howard, Francis, Timothy, J. G., Fryer, Patricia, Horai, Ki-Iti, Kling, Stanley, Meijer, Arend, Nakamura, Kazuaki, Natland, James H., Packham, Gordon H., Sharaskin, Anatoly Ya., Leg 60 of the cruises of the drilling vessel Glomar Challenger; Apra, Guam to Apra, Guam; March-May 1978, 60, 473-481, georefid:1982-040404