Major subject strengths include the European exploration and discovery of the Americas, the development of the Spanish and Mexican borderlands, and the history of the Trans-Mississippi West. The library also possesses significant collections in the fields of business, transportation (especially related to railroads), and science and technology (with notable holdings in the history of geology). Other collections are devoted to major and minor figures in English and American literature, and there is significant material related to tourism in Mexico.
The DeGolyer Library preserves over 120,000 volumes of rare and scholarly works, over 2,500 separate manuscript collections, over 500,000 photographs, several thousand maps, hundreds of rare periodicals and newspapers, and a large and growing collection of printed ephemera.
The library’s website is http://smu.edu/cul/degolyer/