Ref Question- Pneumocephalus 1914

Hello- A patron is writing a paper and has found that Wolff wrote the first 
paper on "pneumozephalus" (we would say pneumocephalus) (air within the cranial 
cavity) in 1914 but has no other information. We only have Index Medicus back 
to the 1940's.  Can someone with older index medicus check for this reference? 
I have no other way to do this that I know. Thanks.

With respect,

Charles R. Fikar, MD, DABP, MSLS, AHIP
Library Manager
St. Vincent Catholic Medical Centers
Woods Health Sciences Library
88-25 153rd St- Ste 1-P
Jamaica, NY 11432
718-558-7230
(fax) 718-558-7233
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