My scan of the print edition (kindly mailed to me many years ago by Doug McIlroy), which includes the historical manpages as well as the commentary: https://arc

My scan of the print edition (kindly mailed to me many years ago by Doug McIlroy), which includes the historical manpages as well as the commentary: https://archive.org/details/research-unix-reader/ https://archive.org/details/research-unix-reader/