na INLIS000000000010772 20210520151129 210520||||||||| | ||| |||| || | 010-0521010772 en Th.636.3.09(910)/ROM/s Th.636.3.09(910)/ROM/s Romjali, Endang Studies of genetic resistance of sheep to gastro-intestinal nematodes in North Sumatera, Indonesia ix, 83 p.: ill.; 23 cm. INDONESIA -- SHEEP -- NEMATODA -- THESIS -- NORTH SUMATERA -- GENETIC RESISTANCE