Canal Colecionador de Ossos
https://sites.psu.edu/gillianpassionblog/2020/10/29/pennsylvania-frankford-slasher/
https://en.wikipedia.org/wiki/Frankford_Slasher
https://crimelibrary.org/serial_killers/unsolved/frankford_slasher/index.html
https://prezi.com/nh1bp96nsvny/the-frankford-slasher/
https://villains-history-versos-galery.fandom.com/pt-br/wiki/Frankford_Slasher