April 1951 - November 1951
The Board of the Electrotechnische Vereeniging of {period} has been constituted as follows:
Frits Niemöller | President |
W.L.E. Kroos | Secretaris |
G.H. Jobsis | Thesaurier |
A.A. Loeff | Excursieleider |
Pieter Fockens | Commissaris |