Hi,
I'm looking for a sheet from the AMS Greenland 1:250k series (C501). The
sheet is NT 17, 18, 19, 20-10 (aka Hvalsund). I've seen evidence that this
sheet actually exists--it's even held by a few libraries (e.g., Harvard,
Penn St.)--but have not yet found it online.

No success at two of my usual sources for something like this:
* UMN's Polar Geospatial Center has the series but not the sheet
* UTexas--sorta inexplicably and against all odds--seems not to have the
series at all. (Am I blind?)

Can anybody help?

Thanks very much.
Michael