What do unions do?

Revision	When	Who	Comment

13	February 13, 2020	MARC Bot	remove fake subjects
12	December 13, 2019	MARC Bot	import existing book
11	July 15, 2016	Robert E Lucore	Added new cover
10	July 15, 2016	Robert E Lucore	Added new cover
9	July 15, 2016	Robert E Lucore	Edited without comment.
8	February 10, 2011	EdwardBot	add lending subjects
7	January 26, 2011	ImportBot	add subjects from new record
6	December 5, 2010	Open Library Bot	Added subjects from MARC records.
5	December 4, 2010	Open Library Bot	Added subjects from MARC records.
4	May 6, 2010	ImportBot	add scanned books from the Internet Archive
3	April 28, 2010	Open Library Bot	Linked existing covers to the work.
2	February 1, 2010	WorkBot	add more information to works
1	December 9, 2009	WorkBot	add works page