Urinary bladder tumors studied by cystosonography. Part I: Detection M M Abu-Yousef, A S Narayana, E A Franken, Jr, R C Brown. Radiology. Urinary bladder tumors studied by cystosonography. Part I: Detection. 1984; 153. 1984 https://researcherprofiles.org/profile/402645405 M M Abu-Yousef, A S Narayana, E A Franken, Jr, R C Brown