© This work in written form, not including all videos within text, is the property of Kenneth Billings. It is not for commercial use but may be used freely by individuals for research, teaching and personal use as long as this statement of availability or a hyperlink to my particular page that you refer to is included in the text. (That seems to be the most simple way I can think of to make it convenient for you and to make the works in my site available for others. If you need to use it for print instead of online, merely type the url and page.)