1926- Box 299 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978SSargent and Company (New York, N.Y.)
1926-1927 Box 54, Folder 791-792 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978CChicago Apparatus Company (Chicago, Ill.)
1926-1944 Box 117, Folder 1416-1419 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978GGeneral Electric Company (New York, N.Y., etc.)
1927- Box 70 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978CCentral Scientific Company (Chicago, Ill.)
1927- Box 354 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978WWelch, W. M., Manufacturing Company (Chicago, Ill.)
1928- Box 57, Folder 797 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978CCleveland Electric Tamrail Division of Cleveland Crane and Engineering Company (Wickliffe, Ohio)
1928- Box 315 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978SScientific Materials Company (Pittsburgh, Pa.)
1929- Box 71 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978CCentral Scientific Company (Chicago, Ill.)
1929-1931 Box 55, Folder 793-794 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978CChicago Apparatus Company (Chicago, Ill.)
1930- Box 119, Folder 1424 Bookmark Collection Context Yale University -Beinecke Rare Book and Manuscript Library Trade catalogs collection., 1800-1978GGeneral Electric Company (New York, N.Y., etc.)