The role of genetics in mental retardation.

Revision	When	Who	Comment

10	October 7, 2020	MARC Bot	import existing book
9	November 17, 2018	MARC Bot	import existing book
8	April 5, 2014	ImportBot	Added IA ID.
7	December 6, 2011	ImportBot	import new book
6	April 29, 2011	OCLC Bot	Added OCLC numbers.
5	April 16, 2010	bgimpertBot	Added goodreads ID.
4	April 14, 2010	Open Library Bot	Linked existing covers to the edition.
3	December 14, 2009	WorkBot	link works
2	October 2, 2009	ImportBot	Found a matching record from Library of Congress .
1	April 1, 2008		Imported from Scriblio MARC record.