Peter, those are from Vic's 1982 book "Exotic Motorcycles - a tester's privilege" by Osprey Publishing, ISBN 0 85045 3224
In this folder on my website:
Index of /graphics/aero
I've also got a good article from Motorcyclist magazine that compared some early 1970s F750 race fairings.
Index of /graphics/MotoGuzzi
has a number of photos of the Guzzi racing dustbin fairings and
Index of /graphics/NSU
has many photos of the NSU "hammock" streamliners.
cheers,
Michael