That none of Petri's films are available on english language dvd (apart from the OOP AB 10th Victim) is unfathomable.
Just saw A QUIET PLACE IN THE COUNTRY fandub about a week ago. Brilliant, crazy film! Love INVESTIGATION and 10th VICTIM too. Petri definitely needs to be reevaluated and we need a Criterion or Eclipse box set of his films w/subs for English speaking (reading) film lovers.
BTW a Region free NTSC version of the 10th VICTIM from Russia, with English & Italian audio
is available at Amazon.com, or through Tony at Xploited.
I bought the Russian disc, which uses an Italian print - with an anamorphic 1.78:1 transfer - and possibly may be the same source as the 2001 US Anchor Bay R1 NTSC disc, though the AB disc appears to be composed just slightly tighter at the top. For example, on the AB disc the MC at Masoch Club has part of his head slightly cropped off, while the Russian disc has just a slight bit more of info on top to avoid the cropping. It's really negligible.
The Russian disc has Italian, English and Russian audio with Russian and English subtitles, while the AB disc Italian and English audio with English subtitles. On the Russian disc, if you choose the Russian audio, it plays over the Italian track simultaneously, so it must be a commentary track.
On the Russian disc the Italian track is mixed nicely with Piero Piccioni's fabulous score prominent, while the English track is muffled with Piccioni's score buried in the mix. The AB disc is just the reverse with the English being the better of the two mixes.
Since I prefer the mix with Marcello Mastroianni's voice, I prefer the Russian disc for the superior Italian audio mix.