Stewart, Elizabeth A.: Genetic and Physical Analysis of the Cryptic, Endogenous β-Galactosidase Gene of Bacillus Subtilis, 1986, Box: 4. Cornell University Office of Undergraduate Biology honors theses, 53-2-4432. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/919596 Accessed August 26, 2026.