APHP.S1.A.F3.16
- Record APHP_S1_A_F3_16-002.jpg Back of F. Wagner Schlesinger demonstrating a 'why the sky is blue' exhibit APHP.S1.A.F3.16 CC BY-SA, https://creativecommons.org/licenses/by-sa/2.0/
- Digital Collection Adler Planetarium Historic Photographs
- Rights CC BY-SA, https://creativecommons.org/licenses/by-sa/2.0/