HOPE ANITA, S.; ANITA FRANKLIN, A.; O.E OMAMOKE, E.; GODWIN KPAROBO, A. NATURAL RADIOACTIVITY AND CANCER RISK ASSESSMENT OF BUILDING MATERIALS IN NORTHERN DELTA STATE, NIGERIA. GPH-International Journal of Applied Science, v. 9, n. 7, p. 39-49, 2 set. 2026.