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本文简要分析了美国编目的发展状况；探讨了电子化、数字化、网络化环境下，联合编目的作用，并提出２１世纪联合编目趋势
This article briefly analyzes the development of the cataloging in the United States; explores the role of joint cataloging in the electronic, digital and networked environments, and puts forward the trend of joint cataloging in the 21st century