University of Chicago, Graduate Library School , 1970
Buku Referensi
Crick, Bernard
Routledge & Kegan Paul, 1959
Buku Teks
Gettell, Raymond G.
Appleton-Century-Crofts, 1928
Buku Teks
McFarlands & Company, 1983
Buku Referensi
American Association for the Advancement of Science,, 1974
Buku Teks