Hector-Louis Langevin
[arz] هيكتور لويس لانجيڤين
[de] Hector-Louis Langevin
[eo] Hector-Louis Langevin
[fr] Hector-Louis Langevin
[pl] Hector-Louis Langevin
[ru] Ланжевен, Эктор-Луи