GDG- How many Gettysburg books?

[Tom Ryan]

<<There  might be a few strays about that I missed, but I came up with 68 on
Getttysburg


And immediately after sending this I came up with 3 more.  No. make  that 4
more - I had forgotten the US War College Guide to Gettysburg.  No,  5 more,
I
had also forgotten ...>>

It is difficult to pin down isn't it.  Gettysburg books seem to keep popping
up in different places.  When I need them I know where they are, but
counting them is a whole other matter.

Tom