Misc: how many times a year is a bimonthly periodical published?

Questions

Tennessee Williams play "Cat on a Hot Tin Roof" opened on Broadway.?

Elvis Presley was inducted into the Army in Memphis, Tenn.?

Great Britain imposed direct rule over Northern Ireland.?

Argentine pres. Isabel Peron was deposed by her country's military.?

US and Libya clash in the Gulf of Sidra.?