[David Heeschen, 1962]
David S. Heeschen, 1962. (NRAO/AUI image)

[David Heeschen, 1991]
David S. Heeschen, 1991. (NRAO/AUI image)

[Heeschen speaking at 140 foot dedication]
Heeschen speaking at 140 ft dedication, October 1965. (NRAO/AUI image)