Ujiié, Hiroshi
The Poronai foraminifera of the northern Ishikari coal-field, Hokkaido - Tokyo Geographical Institute and Geological and Mineralogical Institute, Tokyo University of Education March 1960 - pp. 117-133 láms.
FORAMINIFERA
MICROPALEONTOLOGIA
TERCIARIO
JAPON
The Poronai foraminifera of the northern Ishikari coal-field, Hokkaido - Tokyo Geographical Institute and Geological and Mineralogical Institute, Tokyo University of Education March 1960 - pp. 117-133 láms.
FORAMINIFERA
MICROPALEONTOLOGIA
TERCIARIO
JAPON