David Zilberman, Joachim Otte, David Roland-Holst, Dirk Pfeiffer, editors
[Springer, ], 2012
eBooks
edited by Kenneth Lee, Anne Mills
Oxford University Press, 1984
Buku Teks
Julia Hussein, Affette McCaw-Binns, and Roger Webber.
CABI, 2012
Buku Teks
edited for the International Epidemiological Association and the World Health Organization by Basil S. Hetzel
Oxford University Press, 1978
Buku Teks
Akin, John S., author
World Bank, 1987
Buku Teks