Belshaw, Horace
Food and Agriculture Organization of the United Nations, 1959
Buku Teks
Benham, Frederic
Oxford University Press, 1962
Buku Teks
Weissenbruch , 1959
Buku Teks
edited by Bert F. Hoselitz
University of Chicago Press, 1952
Buku Teks
edited by Bert F. Hoselitz
University of Chicago Press, 1952
Buku Teks