American Association for the Advancement of Science, 2018
Majalah, Jurnal, Buletin
by Geoff Green ... [and others]
John Muray, 1975
Buku Referensi
Derry, Gregory N.
Princeton University Press , 1999
Buku Teks SO
by Geoff Green ... [and others]
John Murray, 1976
Buku Teks SO
Menard, Henry W.
Harvard University Press, 1971
Buku Teks SO