Ovum for eggs : Ovum ensures healthy poultry / [J. Thorley Ltd.]
Licence: In copyright
Credit: Ovum for eggs : Ovum ensures healthy poultry / [J. Thorley Ltd.]. Wellcome Collection. Source: Wellcome Collection.
Licence: In copyright
Credit: Ovum for eggs : Ovum ensures healthy poultry / [J. Thorley Ltd.]. Wellcome Collection. Source: Wellcome Collection.