Inc. Tec-Ease

title	ISBN-13 (ISBN-10)	year of publica- tion	other author(s)
Y14. 5-2009 GD&T Hierarchy Pocket Guide	978-0-9792781-7-4 (0-9792781-7-1)	2009	Don Day
Y14. 5-2009 GD&T Hierarchy Textbook	978-0-9792781-6-7 (0-9792781-6-3)	2009	"