United States. Congress. Office of Technology Assessment. New developments in biotechnology: field-testing engineered organisms: genetic and ecological issues: contractor documents, volume 2, report, December 2, 1986; (https://digital.library.unt.edu/ark:/67531/metadc97427/m1/1/: accessed June 17, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .