"signing" the testimonial regarding rights for NPS to share digital versions of these manuscripts

chapters/README.md

@@ -10,3 +10,5 @@ students taking the course who needed the book.  The original versions are in
 the [scans](./scans/) subdirectory.  Updated versions in this directory have been
 produced using [Optical Character Recognition (OCR)](https://en.wikipedia.org/wiki/Optical_character_recognition) 
 via Adobe Acrobat 11 in order to facilitate search.
+
+/signed/ Donald P. Brutzman, 12 April 2020