(1964). Causes of variation in birth weight of Friesian calves. test, 4(1), 27-33. doi: 10.21608/ejap.1964.128459
. "Causes of variation in birth weight of Friesian calves". test, 4, 1, 1964, 27-33. doi: 10.21608/ejap.1964.128459
(1964). 'Causes of variation in birth weight of Friesian calves', test, 4(1), pp. 27-33. doi: 10.21608/ejap.1964.128459
Causes of variation in birth weight of Friesian calves. test, 1964; 4(1): 27-33. doi: 10.21608/ejap.1964.128459