Martial Fit

year of publication	ISBN	author(s)	title
2006	978-0-9553750-0-2	David Allerton	Secret Moves: Tang Soo Do (ho Sin Sul) a Practical Guide to the Pyung Ahn Forms
2015	978-0-9553750-1-9	David Allerton	Tang Soo Do (Ho Sin Sul) Stillness in Motion