模板:R:zh:Laufer:1913
Laufer, Berthold (1913), 「Arabic and Chinese Trade in Walrus and Narwhal Ivory」, T'oung Pao, 卷14, DOI:, 頁315–364
Laufer, Berthold (1913), 「Arabic and Chinese Trade in Walrus and Narwhal Ivory」, T'oung Pao, 卷14, DOI:10.1163/156853213X00213, 頁315–364