11.   The city has even started a billboard campaign.

12.   The new billboard campaign includes a more aggressive use of ads linking cigarettes to impotence.

13.   All over Croatia, a billboard campaign encourages Croatians to show their country at its best.

14.   The billboard campaign to promote religious tolerance is believed to be the first in the nation conducted by Muslims, he said.

15.   The government is trying to raise the profile of AIDS through a public billboard campaign.