https://mirror.math.princeton.edu/pub/CTAN/systems/mac/metafont/
Index of /pub/CTAN/systems/mac/metafont
index ofpubctansystemsmac
https://www.informit.com/store/computers-typesetting-volume-d-metafont-the-program-9780201134384
Computers & Typesetting, Volume D: Metafont: The Program | InformIT
The is the fourth volume in a five-volume series on Computers and Typesetting, all authored by Donald E. Knut
the programcomputerstypesettingvolumemetafont
https://tug.ctan.org/systems/atari/birkhahn-metafont/mf27-2.3beta/
Index of /systems/atari/birkhahn-metafont/mf27-2.3beta
index ofsystemsataribirkhahnmetafont