That link gives a 403 for me, presumably because fabiensanglard.net disabled hotlinking. For others who run into the same problem, the file can be accessed via

That link gives a 403 for me, presumably because fabiensanglard.net disabled hotlinking. For others who run into the same problem, the file can be accessed via https://fabiensanglard.net/gebbdoom/index.html#:~:text=High%2DRes%20PDF%20is%20here%2E https://fabiensanglard.net/gebbdoom/index.html#:~:text=High%... . (I've highlighted the link to click.)