The NBS Standard Hygrometer, report, May 1, 1964; (https://digital.library.unt.edu/ark:/67531/metadc70454/m1/1/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
The NBS Standard Hygrometer, report, May 1, 1964; (https://digital.library.unt.edu/ark:/67531/metadc70454/m1/1/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .