Author's Organization:Department of Geosciences,Faculty of Science,Osaka City University Department of Geosciences,Faculty of Science,Osaka City University NEC Software Kansai,Ltd.,
Published: June 15, 1993Received: December 11, 1992Available on J-STAGE: April 11, 2008Accepted: March 16, 1993
Advance online publication: -
Revised: -