Articles, papers, pamphlets, press releases and books that give insight into either the Upjohn Company as a whole, or some segment of the company, are found in this series. The histories are separated into "internal" and "external" histories, which notes if they were published by Upjohn or by someone within the company, or whether they were written outside of the company. Of special interest is "The Story of an American Enterprise" which is a 50 year history on the Upjohn Company written by L. N. Upjohn, the nephew of the founder, W. E. Upjohn.