Plane trigonometry, a new approach

Revision	When	Who	Comment

9	December 3, 2022	ImportBot	import existing book
8	October 13, 2020	MARC Bot	import existing book
7	May 14, 2012	ImportBot	import new book
6	February 22, 2012	ImportBot	import new book
5	April 28, 2011	OCLC Bot	Added OCLC numbers.
4	August 3, 2010	IdentifierBot	added LibraryThing ID
3	April 16, 2010	bgimpertBot	Added goodreads ID.
2	December 14, 2009	WorkBot	link works
1	April 1, 2008		Imported from Scriblio MARC record.