Credits (The GNU Troff Manual)

### 1.9 Credits

We adapted portions of this manual from existing documents. James Clark’s man pages were an essential resource; we have updated them in parallel with the development of this manual. We based the tutorial for macro users on Eric Allman’s introduction to his `me` macro package (which we also provide, little altered from 4.4BSD). Larry Kollar contributed much of the material on the `ms` macro package.