(原始内容存档于2020-12-05). A.Gray. International Plant Names Index. Asa Gray. Dictionary of American Biography. American Council of Learned Societies, 1928-1936
yougoslave de droit international: Année (Journal, French) Procès-verbal... du Conseil de la Société des nations = Minutes of the... Council of the League of
(页面存档备份,存于互联网档案馆)>. "Comparative Advantage." Def. 1. Washington Council on International Trade. 2001. International Trade Education Foundation. 14 Nov. 2006 <https://web