ENVIRONMENTAL AND ECOLOGICAL FORUM, 1970--1971., report, January 1, 1972; (https://digital.library.unt.edu/ark:/67531/metadc1028766/m1/1/: accessed May 8, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
ENVIRONMENTAL AND ECOLOGICAL FORUM, 1970--1971., report, January 1, 1972; (https://digital.library.unt.edu/ark:/67531/metadc1028766/m1/1/: accessed May 8, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .