lost Nothinger reference

[Richard Gordon]

If you know what paper/book Nothinger (1972) might refer to, I would 
appreciate the reference. Thanks.
Yours,
Dick Gordon
-- 

Dr. Richard Gordon, Radiology/Electrical & Computer Eng., University 
of Manitoba, HSC Rm. GA216, 820 Sherbrook St., Winnipeg R3A 1R9 
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