Glenn, John: Encarta encyclopedia article about the first American to orbit in space.
Glenn, John Herschel, Jr.: From the Biographical Directory of the United States Congress.
Glenn, John Herschel, Jr.: Brief biography about the astronaut from Fact Monster.
John Glenn: Biography of the astronaut was given the opportunity for a second space flight 36 years after his first flight.
John Glenn, Jr.: Biographical data for the American astronaut provided by NASA.
John Hershel Glenn, Jr.: Student's report about John Glenn, first American to orbit in space.