An historical and descriptive account of the four species of Peruvian sheep, called carneros de la tierra : to which are added, particulars respecting the domestication of the two wild species, and the experiments hitherto made by the Spaniards, to cross the respective breeds, to improve their wools, &c. / - Walton, William, (Sold by Longman, Hurst, Rees, Orme, and Brown,, 1811)