Commonly Used MARC21 Fields for cataloguing books in OpenBiblio

Material Type: Books

Description	Tag	Example	remarks
International Standard Book Number:	020$a
Classification number	050$a		Later to be copied as call# in openbib
Personal name:	100$a	Wells, H. G.	First author only There is punctuation (usually a period) at the end of the field unless the name has an open date.
Main entry - Corporate name	110$a
Title	245$a	The DNA story :
Remainder of title:	245$b	a documentary history of gene cloning /
Statement of responsibility, etc.:	245$c	prepared by Margaret Peg Davis and John Hohmann. (two authors) by Margaret Peg Davis … [et al.]. (for four or more authors). by Margaret Peg Davis … [et al.] ; with contributions by John Hohmann … [et al.]. (for four or more authors with four or more contributors)	There is punctuation (usually a period) at the end of the field.
Edition statement:	250$a
Place of publication, distribution, etc.:	260$a
Name of publisher, distributor, etc.:	260$b
Date of publication, distribution, etc.:	260$c
Extent	300$a
Summary, etc. note	520$a
Topical term or geographic name as entry element:	650$a
Topical term or geographic name as entry element:	650$a
Topical term or geographic name as entry element:	650$a
Topical term or geographic name as entry element:	650$a
Topical term or geographic name as entry element:	650$a
Added entry--personal name	700$a	Wells, H. G.	Other authors
Added entry - Corporate name	710$a

References:
http://www.libraries.psu.edu/psul/cataloging/training/bpcr/choice.html#3a
http://www.loc.gov/marc/umb/um07to10.html
http://www.statemuseum.arizona.edu/library/cataloging_manual/createbibrec.shtml