Author's Organization:/ Department of Earth Sciences,Ibaraki Univeasity Dowa Koei,Co., Hino Laboratory,Kokusai Kogyo,Co., Department of Earth Sciences,Ibaraki Univeasity
Published: October 15, 1992Received: March 27, 1992Available on J-STAGE: April 11, 2008Accepted: June 25, 1992
Advance online publication: -
Revised: -