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Heinrich
Bruns

Universität Leipzig (Physics Tree)


Johannes Franz
Hartmann

Kuffner-Sternwarte


Walter
Baade

Mount Wilson Observatory


Allan Rex
Sandage

Mount Wilson-Palomar (Physics Tree)




Bart J.
Bok

University of Arizona


Frank Kelley
Edmondson

University of Indiana


Arthur
Young

San Diego State University

Howard H.
Lanning

Space Telescope Science Institute
(Options)

Howard LanningX