30 目前 MARC 21 由下列何者負責維護?
(A)大英圖書館(British Library, BL)
(B)美國圖書館學會(American Library Association, ALA)
(C)美國國會圖書館(Library of Congress, LC)
(D)國際圖書館協會聯盟(International Federation of Library Associations and Institutions, IFLA)
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統計: A(9), B(91), C(300), D(94), E(0) #2128091
統計: A(9), B(91), C(300), D(94), E(0) #2128091