Author's Organization：Japanese Association to Aid the Refugees,C/O Maheba Refugee Settlement,Solwezi,Zambia Institute of Earth Science,School of Education,Waseda University
Published: May 15, 1987Received: September 25, 1986Available on J-STAGE: April 11, 2008Accepted: February 16, 1987
Advance online publication: -
Revised: -
