This book is online for free (three cheers for exotic spelling at archive.org). http://files.catwell.info/misc/mirror/the-unix-programming-environment-kernigha

This book is online for free (three cheers for exotic spelling at archive.org). http://files.catwell.info/misc/mirror/the-unix-programming-environment-kernighan-pike.pdf http://files.catwell.info/misc/mirror/the-unix-programming-e... https://archive.org/details/UnixProgrammingEnviornment https://archive.org/details/UnixProgrammingEnviornment