Bill Munns' film analysis is coupled with his experimental work trying to build a Bigfoot costume to match the 1967 film and co-authorship of a peer-reviewed paper with Meldrum showing it couldn't have been a costume. Munns studied film and worked for 35 years making monsters for films, museums, and wildlife exhibits, thus is highly-qualified for the study he has done. His conclusions cannot be dismissed.
Peer-reviewed Science Proving the Patterson-Gimlin Film is not of a Bigfoot Costume but a Novel Primate Species
If Patty Was a Costume, Why Can't They Recreate It?
Debunking Claimed Patterson-Gimlin Film Bigfoot Hoaxer Bob Heironimus
Skeptic Questions Patterson Bigfoot Tracks