Hasby Puarada S, Nadia Syafrilia Gurning R. AN ANALYSIS OF MARKETING EFFICIENCY OF BEEF CATTLE BREEDERS PERCUT SEI TUAN DISTRICT, DELI SERDANG REGENCY, NORTH SUMATERA. MORFAI [Internet]. 2021 Nov. 22 [cited 2024 Nov. 15];1(2):145-54. Available from: http://radjapublika.com/index.php/MORFAI/article/view/47