Development Cooperation Information Department , 1994
Buku Teks
Kalyanamitra, 1998
Buku Teks
edited by Carol Vlassoff, Barkat E. Khuda
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Buku Teks
edited by John C. Caldwell
Dept. of Demography, A.N.U, 1977
Buku Teks
Hans Groth
Springer, 2012
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