Contains research articles arranged by subject with some highlighted sections, underlining, annotations, and corresponding notes. Many of the articles are numbered, with like numbers grouped together in the same research subject file. It is unclear, however, to exactly what the numbering corresponds. The collected publications which are not organized into subject files do not exhibit this numbering; the numbers may represent a research organization system imposed by Snyderman and/or his staff. Materials range in date from 1899 to 1989.