The John Hopkins University Press , 1975
Buku Teks
National Academy of Science, 1974
Buku Teks
edited by Philip M. Hauser
Prentice-Hall, 1969
Buku Teks
Population Institute East-West Center, 1987
Majalah, Jurnal, Buletin
National Academy of Sciences-National Research Council , 1963
Buku Teks