About BE ́ A W H
About Columbia Univ., New York
About HEMLEBEN C
About Univ. Tuebingen, West Germany
About ANDERSON O R
About Columbia Univ., New York
About SPINDLER M
About Univ. Tuebingen, West Germany
About Micropaleontology
About 浮遊性有孔虫
About 浮遊性有孔虫