Cincinnati and state legislators and a gun-control advocate said today that Ohio needs to enact a ban on military-style assault weapons. They said a state law is needed because they are concerned that Congress and President Bush may not extend a ban which expires in September. State Representative Tyrone Yates of Cincinnati introduced his legislative proposal on Wednesday in Columbus. State Senator Eric Fingerhut of Cleveland introduced a similar proposal in December which is pending. David Crowley of the Cincinnati City Council said he supports a ban of semi-automatic weapons. The National Rifle Association has fought efforts to extend the federal ban. The N-R-A contends that having semiautomatic weapons and other firearms would allow Americans to better defend themselves against criminals.