What reference book went on sale for the first time in 1955?

More Questions:

When was Twitter first launched?

Klaxon horns were used on what type of vehicle during World War II?

What model was married to musician Marilyn Manson?

Which building houses the world's biggest four-faced chiming clock?

Who wrote "The Cat in the Hat" and "Green Eggs and Ham"?

What layer of the atmosphere is closest to the earth?

What does the Mohs scale measure?

What was Little Joe Cook's backing band?

What actor played Bill the Butcher in the 2002 movie "Gangs of New York"?

Who played the role of TV's A.C. Slater?

What snack is Tallahassee searching for in the 2009 film "Zombieland"?

Which of Henry VIII's wives may never have slept with him?

What name was Eva Peron known by?

In 1991, who finally broke Bob Beamon's decades-old long jump record?

What year was the first modern set of headphones developed?