Scott, John M.
Loyola University, 1963
Buku Teks
Rose, Arnold M., author
Miniapolis, Minn. University of Minnesota Press. , 1954
Buku Teks
Hazen, Robert M.
John Wiley & Sons, 1995
Buku Teks
Polish Academy of Sciences, 2008
Majalah, Jurnal, Buletin
Jones, W.T. (William Thomas), 1910-, author
University of California, [Date of publication not identified]
Buku Teks