A Perl 5 module for reading in, manipulating, and outputting
bibliographic records in the USMARC format.  It handles conversions
from MARC into ASCII (text),  Library of Congress MARCMaker, HTML,
and ISBD.  Input from MARCMaker format is also supported.  Individual
records, fields, indicators, and subfields can be created, modified, and
deleted.  It can extract URLs from the 856 field into HTML.

WWW: http://marcpm.sourceforge.net/