著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL Ritva Sinikka Reinikka,"Credibility, speculation and the speed of trade liberalization with an application to Kenya",,Supplied by the British Library Document Supply Centre,1993,British thesis service,,,,https://cir.nii.ac.jp/crid/1130282273106862464