Is a new definition required for travelers who visit friends and relatives?
作者信息
Matteelli Alberto, Stauffer William M, Barnett Elizabeth D, MacPherson Douglas W, Loutan Louis, Hatz Christoph, Behrens Ron H
出版信息
J Travel Med. 2010 Nov-Dec;17(6):430-1; discussion 431. doi: 10.1111/j.1708-8305.2010.00468_1.x.
Abstract
摘要
Zotero 插件