 Hickman's work archived at The Briscoe Center for American History has been categorized into subjects with the largest number of photographs taken, including schools, funerals, clubs, colleges and news, signifying Hickman's general style and subjects during the Civil Rights Movement era.The Briscoe Center's archive of Hickman's work has also been coupled with online exhibitions of Hickman and Calvin Littlejohn's photography.Hickman's work has also been on exhibition at the Dallas Historical Society, a non-for-profit organization that aims to convey and uphold artefacts of Dallas' history.