These files contain a variety of material including manuscript and typescript pages; notes; photocopied and original notes used in the production of the 1933 catalog; photocopied and original journal articles, clippings, and correspondence; and photocopies of publications by Gordon Hendricks and of Goodrich's 1933 catalog. Original correspondence is noted.

There are multiple files for chapters 1-22, with the exception of chapter 4. Files had originally been identified by chapter and section or by subject. The chapters and section numbers have been updated to match the published version and applied to all the files, except for three general subject folders found at the end of the subseries. Most files also are identified by subject.