[Gurachn]

Thanks Fastboat,
I read "Hell in a very small place" when I was based in Germany back in the '80s, and it really put the hook in me. I'm going to have to get another copy of that and re-read it.
'Street without Joy' is also excellent.

Since my last post I managed to find another few aerial photos of the valley during the period in question, and think I have just about got the shape of the river and the locations of the main firebases nailed.