This manual page was written for the Debian distribution because the original program does not have a manual page. Instead, it has documentation accessible with the --help option.
csvtool is a tool for performing manipulations on CSV files from shell scripts.
-help --help
This manual page was written by Stephane Glondu steph@glondu.net for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.