. University of Houston Libraries. University of Houston Digital Library. Web. April 20, 2021. https://digital.lib.uh.edu/collection/crude/item/.

Disclaimer: This is a general citation for reference purposes. Please consult the most recent edition of your style manual for the proper formatting of the type of source you are citing. If the date given in the citation does not match the date on the digital item, use the more accurate date below the digital item.

. Domestic Crude. University of Houston Libraries. Retrieved from https://digital.lib.uh.edu/collection/crude/item/

Disclaimer: This is a general citation for reference purposes. Please consult the most recent edition of your style manual for the proper formatting of the type of source you are citing. If the date given in the citation does not match the date on the digital item, use the more accurate date below the digital item.

, Domestic Crude, University of Houston Libraries, accessed April 20, 2021, https://digital.lib.uh.edu/collection/crude/item/.

Disclaimer: This is a general citation for reference purposes. Please consult the most recent edition of your style manual for the proper formatting of the type of source you are citing. If the date given in the citation does not match the date on the digital item, use the more accurate date below the digital item.