Information Today, 2010
Buku Referensi
Muller, Joachim W., author
Oceana Publications, 1992
Buku Referensi
Muller, Joachim W., author
Oceana Publications, 1992
Buku Referensi
1962
Buku Teks
United Nations Population Fund; edited by Reed Boland
United Nations Population Fund and Harvard Law School Library , 1986
Buku Teks