Radio announcements to promote the use of condoms.
Ojeda
G
G
Williams
T
T
Vernon
R
R
D000293:Adolescent; D000328:Adult; D003105:Colombia; D003275:Contraceptive Devices, Male / Q000706:statistics & numerical data*; D006266:Health Education / Q000592:standards*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008875:Middle Aged; D011845:Radio