THIS IS the fifth additional installment of Volume IV, "Otosclerosis," to be issued by the Central Bureau of Research of the American Otological Society, Inc.1 Owing to the unavoidable delays incident to publication in 1948 and 1949, the index for both of these years is included in this installment. Volumes I, II, and III are now out of print.
Many papers have been so well abstracted in various medical journals and especially in the Excerpta Medica that the abstracts could hardly be improved upon. In several instances the conclusions or the abstracts have been quoted almost verbatim. In such instances they are marked with quotation marks or appear in smaller type.
All titles are given in English, but the names of the mediums of publication are printed in the language of the original.
The selection of articles abstracted implies no endorsement or condemnation, and the opinions of the authors