Spilhaus, Athelstan
Creative Educational Society, Inc., 1967
Buku Teks
Harvey, John G., author
Artemis Press, 1985
Buku Teks
Olbers, Dirk, author
Springer, 2012
eBooks
Anderson, Franz E., author
Burgess Publishing, 1979
Buku Teks
Duxbury, Alison B.
McGraw-Hill, 2002
Buku Teks