Hattie, in April 2002 there was a film festival on DW in the UK, http://www.outuk.com/cgi-bin/llgff/filmdetail.pl?link_ref=81 it seems to me that an exhaustive amount of research was put into getting all these works together for this show, which would entail contacting anyone who might know something about your missing film. I truly believe it is out there for the finding. My gut feeling is that if you were to contact the person who did the research for this show, explain to them who you are ... They'd love to talk to you, obviously you are an important figure in this body of work. They might recall seeing something like this in a private list of acquisitions that is not currently available for show or passed over for a more "recognizable" piece. If nothing else, this person might give you the best possible leads there are to follow to find it. This has been my gut instinct on this for months, but was hoping the film might turn up Elsewhere, i.e. in a foreign country.
I will make use of those translation libraries; so happy the web is fazing us back to punctuation-free Latin. Thank you for pointing them out. There is a German artist friend of mine I would like to learn more about, esp. his early years which he does not speak (before the wall came down) or does not remember, ... we get together every three years for five minutes and three drinks, and have the best time. I will scan some of his work this year. (I know he would enjoy my talking about it.). But I think he may have produced an out of print art book in the 80s that is not yet archived online yet. And only mention of it I have found is in German, now I may just be able to get that volume thanks to your alta vista suggestion.
Gigi, there is nothing wrong with not having first-hand knowledge of every artist. Believe me, my art education consists of one class at BU on photography through 1950 and "Art 101" for true Hill Billy Dummies. Anyone who would judge you for the handicap (which you will make up for quickly I'm sure) is an academic eletist and not worth your time. At the same time, knowledge is only passed on, when you listen and make use of what has been shared with you. Now back to painting my new apt. I'm thinking hot tub for the yard ....