Table of Contents: 2017 NOVEMBER–DECEMBER No. 419
General Material Designations Removed from NLM Bibliographic Records. NLM Tech Bull. 2017 Nov-Dec;(419):b15.
The project to replace the General Material Designation (MARC 21 field 245 $h) on pre-Resource Description & Access (RDA) records in the catalog and substitute the appropriate MARC 21 33X fields, described in Removing General Material Designations from NLM Cataloging Records, has been completed. There will not be a separate distribution of these files. Subscribers who wish to receive updated records with the new 33X fields should download the complete base files which will be made available on January 2, 2018 in MARC and XML formats.
