Keys to Soil Taxonomy [Spanish]

Please be aware that viewing a movie from this collection in the Special Collections reading room cannot be guaranteed. Access depends on the physical condition of the film. Due to the age and fragility of the materials, preservation treatment and digitization may be required even for previewing a title to prevent damage. Researchers are encouraged to inquire about the condition and access options for specific films. Contact Special Collections for access.

The film collection is not digitized in full; a few titles are available as digital copies. NAL digitizes the motion pictures as funding is available. For inquiries regarding specific titles or to request digitization, please check with the National Archives and Records Administration (NARA). NARA may have certain titles already digitized, or you can request digitization services from their approved vendors for a fee. For detailed information on NARA's film holdings and contact specifics for their film section, please visit their official website at Archives.gov. You can navigate to their "Research Our Collections" or "Contact Us" sections and look for departments related to motion pictures, audiovisual records, or film archives for the most direct contact.