Ayivor, V. F. K. Poultry-keeping in the tropics / by V. F. K. Ayivor and C. E. K. Hellins. - 2nd ed. - London : Oxford University Press, 1960. - iv, 58 p. : ill. ; 18 cm. Subjects--Topical Terms: Poultry--Tropics. Dewey Class. No.: AF P 636.5 AYI