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 "Maltzan, Heinrich, Freiherr von","Adolph von Wrede's Reise in Ḥadhramaut, Beled Beny ʿYssà und Beled el Hadschar",,Institute for the History of Arabic-Islamic Science at the Johann Wolfgang Goethe University,1995,Publications of the Institute for the History of Arabic-Islamic Science,,,,https://cir.nii.ac.jp/crid/1130282269703540352