Template:R:zh:Laufer:1913
Laufer, Berthold (1913), “Arabic and Chinese Trade in Walrus and Narwhal Ivory”, T'oung Pao, 卷14, DOI:, 页315–364
Laufer, Berthold (1913), “Arabic and Chinese Trade in Walrus and Narwhal Ivory”, T'oung Pao, 卷14, DOI:10.1163/156853213X00213, 页315–364