References to current radio literature

This is a monthly list of references prepared by the Bureau of Standards, and is intended to cover the more important papers of interest to the professional radio engineer which have recently appeared in periodicals, books, etc. The number at the left of each reference classifies the reference by subject, in accordance with the "Classification of Radio Subjects; an Extension of the Dewey Decimal System," a revised edition of Bureau of Standards Circular No. 138 which appeared in full on pp. 1433 56 of the August, 1930, issue of the Proceedings of the Institute of Radio Engineers. The classification numbers are in some instances different from those used in the earlier version of this system (first edition of Circular 138) used in the issues of the Proceedings of the Institute of Radio Engineers before the October, 1930, issue.