A treatise on milch cows : whereby the quality and quantity of milk which any cow will give may be accurately determined by observing natural marks or external indications alone : the length of time she will continue to give milk, &c.
Guénon, François, 1796-1855; Skinner, John Stuart, 1788-1851. Cow and the dairy; Morin, P. A. Spaying of cows