Horowitz, David, author
Praeger, 1972
Buku Teks
Johansen, Leif, author
North-Holland, 1974
Buku Teks
Coale, Ansley J., author
Princeton University Press, 1961
Buku Teks
Coale, Ansley J., author
Princeton University PRess, 1972
Buku Teks
Coale, Ansley J., author
Princeton University Press, 1958
Buku Teks