[Hvatum, 1963]
Hvatum, 1963. (Photo courtesy of NRAO/AUI/NSF)

[Hvatum with his bicycle, undated]
Hvatum with his bicycle, undated. (Photo courtesy of NRAO/AUI/NSF)

[Hvatum, 1980]
Hvatum, 1980. (Photo courtesy of NRAO/AUI/NSF)