MUHAMMAD, Isah; SULEIMAN, Mujtaba; ABDU, Mannir. ALTERNATIVE TWO-PHASE VARIANCE ESTIMATORS IN THE PRESENCE OF RANDOM NONRESPONSE. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 9, n. 9, p. 359–365, 2025. DOI: 10.33003/fjs-2025-0909-3824. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/3824. Acesso em: 29 oct. 2025.