Meyer, Frank S.
Harcourt, Brace , 1961
Buku Teks
Dinerstein, H.S., author
Frederick A. Praeger, 1962
Buku Teks
Dewdney, John C.
Pergamon Press, 1979
Buku Teks
USSR, [date of publication not identified]
Buku Teks
Schwarz, Fred
Prentice-Hall, 1961
Buku Teks