Patterns of television viewing and associated factors among adolescent school children in the Anuradhapura Educational Zone, Sri Lanka
A Padeniya,
R A Kumarathunga,
W S Dissanayake,
P C Jayawardhana,
C N Nuwandika,
T M Rathnayeka,
C N Weerakoon,
D W Delpagoda Delpagoda