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[1] Advanced Interactive Media Group: Digital Newspapers: What, How and Why, http://www.newsstand.com/
[2] 资料来源:www.naa.org
[3] Advanced Interactive Media Group: Digital Newspapers: What, How and Why, http://www.newsstand.com/
[4] Advanced Interactive Media Group: Digital Newspapers: What, How and Why, http://www.newsstand.com/