Versions
The Arabic documentation of the MARC 21 Format for Bibliographic Data is in a print complete edition, covering Update 1 through Update 19; with huge selections from updates 20 and 21, and an online edition that contains a selection of the most commonly used MARC 21 Bibliographic fields, covering until update 28, featuring core fields for Resource Description and Access (RDA) application, namely fields 264, 336, 337 and 338.
online edition