Estimation of Genetic Parameters for Persistency of Lactation in Sahiwal Dairy Cattle.Published in:Pakistan Journal of Zoology, 2017, v. 49, n. 3, p. 877, doi. 10.17582/journal.pjz/2017.49.3.877.882By:Zurwan, Ali;Moaeen-ud-Din, Muhammad;Bilal, Ghulam;Zia-ur-Rehman;Khan, Muhammad SajjadPublication type:Article