http://www.takhteyev.org/courses/11W/inf1005/pymarc.pdf Lists commands available on the record object e.g. record.title() prints title
Examples from the Github wiki: https://github.com/edsu/pymarc/wiki/Examples
Code has useful documentation in record.py https://github.com/edsu/pymarc/blob/master/pymarc/record.py and field.py too