Author's Organization：Institute of Earth Science,School of Education,Waseda University Institute of Earth Science,School of Education,Waseda University Institute of Earth Science,School of Education,Waseda University Institute of Earth Science,School of Education,Waseda University Hiruzen Research Institute,Okayama University of Science
Published: January 15, 1992Received: May 13, 1991Available on J-STAGE: April 11, 2008Accepted: October 16, 1991
Advance online publication: -
Revised: -
