You are welcome to download whatever you like from this site
for personal or educational use.
If you use some of this stuff on the web or elsewhere,
I ask that you provide a link
Falling into a Black Hole page.
If you use material from these pages other than on the web,
I ask that you give due credit,
and provide the URL reference to my homepage,
This is a matter of standard web etiquette.
Whenever you use other people's stuff,
you should reference the source.
Falling into a Black Hole
Updated 27 Jan 2018