The four doctrines

Revision	When	Who	Comment

9	February 17, 2023	ImportBot	import existing book
8	July 14, 2020	MARC Bot	remove fake subjects
7	November 22, 2018	ImportBot	import existing book
6	November 28, 2012	AnandBot	Fixed spam edits.
5	November 26, 2012		Edited without comment.
4	May 11, 2010	EdwardBot	add Accessible book tag
3	April 28, 2010	Open Library Bot	Linked existing covers to the work.
2	February 13, 2010	WorkBot	add more information to works
1	December 8, 2009	ImportBot	add works page