Aoki, Naoaki A psmmotreta (Tellinimactra) species from the Narita Formation, Shimotsuma, southern Ibaraki, Central Japan - Tsukuba University of Tsukuba, Institute of Geoscience 1987 - pp. 74-79 ISSN: 0285-3175 Subjects--Topical Terms: BIVALVIAPALEONTOLOGÍAPLEISTOCENO Subjects--Geographic Terms: JAPON