Yoon, Hyungsuk Alexander. The structures and dynamics of atomic and molecular adsorbates on metal surfaces by scanning tunneling microscopy and low energy electron diffraction, thesis or dissertation, December 1, 1996; (https://digital.library.unt.edu/ark:/67531/metadc675330/m1/1/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .