The document identifies Berta Mrazek's family lineage, including parents, grandparents, great grandparents, and 2nd-great grandparents. The Ahnenpass was a standard booklet issued to German citizens in order to prove their ancestry in the Third Reich.
This German identity card, or Personalausweis, was issued to Berta Mrazek at Nestomitz, Germany (now Neštěmice, Czech Republic) in 1941. The card includes a photograph of Mrazek and her daughter Ursula.
In the letter, Sanderson authorizes Mrazek to travel to Houston, Texas and Los Angeles, California "to participate in activities in connection with the Apollo 11 mission, at the invitation of the President of the United States."