https://manpages.ubuntu.com/manpages/resolute/man7/groff_char.7.html
Ubuntu Manpage: groff_char - GNU roff special character and glyph repertoire
GNU roff special character and glyph repertoire
gnu roffspecial characterubuntumanpagegroff
https://manpages.ubuntu.com/manpages/resolute/man7/groff_ms.7.html
Ubuntu Manpage: groff_ms - GNU roff manuscript macro package for formatting documents
GNU roff manuscript macro package for formatting documents
gnu roff
https://manpages.ubuntu.com/manpages/resolute/man7/groff_man_style.7.html
Ubuntu Manpage: groff_man_style - GNU roff man page tutorial and style guide
GNU roff man page tutorial and style guide
man stylegnu roffubuntumanpagegroff
https://manpages.ubuntu.com/manpages/resolute/man7/man.7.html
Ubuntu Manpage: groff_man - compose manual pages with GNU roff
compose manual pages with GNU roff
manual pagesubuntumanpagegroffcompose
https://manpages.ubuntu.com/manpages/resolute/man7/groff_diff.7.html
Ubuntu Manpage: groff_diff - differences between GNU roff and AT&T troff
differences between
https://manpages.ubuntu.com/manpages/resolute/man7/groff_mm.7.html
Ubuntu Manpage: groff_mm - memorandum macros for GNU roff
memorandum macros for GNU roff
ubuntumanpagegroffmmmemorandum