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From left to right:
B.-A. Gould,
H.-J. Chaney,
A. Arndtsen,
R. Thalén (back row),
H. Wild (front row),
W. Foerster (President),
A. Hirsch (Secretary),
J.-R. Benoît (Director of the BIPM, back row),
J. Bertrand,
L. de Bodola,
H. de Macedo,
St.-C. Hepites
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