NACO Members receive subscription to the basic document.
The Policy and Standards Division has made available a comprehensive version of the Descriptive Cataloging Manual (DCM) Z1 and the LC Guidelines Supplement to the MARC 21 Format for Authority Data. These documents are current as of August 1, 2009.
Note to NACO participants: DCM Z1 includes an appendix with instructions specific to Library of Congress staff that may be exluded when printing.