Obruche, .E.K., Emakunu, .S., Ugochukwu , G.C., Etinagbedia., .A. and Akakabota, .A. 2024. DETERMINATION OF THE EFFECTS OF ROOFTOPS ON THE QUALITY OF RAINWATER COLLECTED IN UGHELLI, DELTA STATE, NIGERIA. NIGERIAN JOURNAL OF SCIENCE AND ENVIRONMENT. 21, 3 (Jan. 2024).