Holland, W.D. FINAL REPORT OF STUDIES OF $sup 238$Pu DEBRIS PARTICLES FROM THE SNAP-9A SATELLITE FAILURE OF 1964., report, January 1, 1968; (https://digital.library.unt.edu/ark:/67531/metadc1032836/m1/1/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .