The developmental psychology of Jean Piaget.

Revision	When	Who	Comment

13	December 9, 2021	Gustav-Landauer-Bibliothek Witten	person
12	September 28, 2020	MARC Bot	import existing book
11	May 13, 2019	MARC Bot	import existing book
10	November 17, 2018	MARC Bot	import existing book
9	August 11, 2011	ImportBot	add ia_box_id to scanned books
8	October 28, 2010	ImportBot	Added new cover
7	October 28, 2010	ImportBot	Found a matching record from Library of Congress .
6	August 4, 2010	IdentifierBot	added LibraryThing ID
5	December 14, 2009	WorkBot	link works
4	June 19, 2009	EdwardBot	fix broken author (step 2)
3	June 19, 2009	EdwardBot	fix broken author (step 1)
2	June 1, 2009	ImportBot	Found a matching record from Library of Congress .
1	April 1, 2008		Imported from Scriblio MARC record.