Essential substances

Revision	When	Who	Comment

11	November 17, 2020	MARC Bot	import existing book
10	May 19, 2019	MARC Bot	import existing book
9	September 14, 2011	EdwardBot	merge lending editions
8	August 12, 2011	ImportBot	add ia_box_id to scanned books
7	January 18, 2011	ImportBot	Found a matching record from Library of Congress .
6	July 31, 2010	IdentifierBot	added LibraryThing ID
5	April 16, 2010	bgimpertBot	Added goodreads ID.
4	April 13, 2010	Open Library Bot	Linked existing covers to the edition.
3	December 11, 2009	WorkBot	link works
2	June 9, 2009	ImportBot	Found a matching record from Library of Congress .
1	April 1, 2008		Imported from Scriblio MARC record.